99 Resources to Research
& Mine the Invisible
researchers often need more than Google and Wikipedia to get the job
done. To find what you're looking for, it may be necessary to tap into
the invisible web, the sites that don't get indexed by broad search
engines. The following resources were designed to help you do just
that, offering specialized search engines, directories, and more places
to find the complex and obscure.
Whether you're looking for specific science research
data, these search engines will point you in the right direction.
- Complement Search:
you'll be able to search a great deal of deep web search engines in one place.
- Agricultural Information:
searching for information related to agriculture and farming,
check out this engine.
engine canvasses the deep web.
- Search PowerPoint :
This PPT covers important clues and sites in searching.
search engine taps into the deep web and offers search
tools for feeds, news, blogs, and more.
about corporations and job searchers here.
Archive: Here you'll be able to find movies,
music, text, and more, even including sites and pages that no longer
search engine covers Forbes, specific industries, and
engine serves up public records like phone numbers and
Perform your search across a number of engines at once with Clusty.
web search scours the business web.
Online Books Page: Here you can search for
more than 25,000 full-text works.
E-Print to find sites and databases for scientists and
engineers from one search engine.
Museum: Search for artists through this
search engine, you'll find entries for products, services, and
sources and more with this scientific information search.
you'll be able to search for resources in engineering,
mathematics, and computing.
National Portrait Gallery: Find portraits for
more than 80,000 people in this database.
Portal: In this research portal, you
can search the deep web for scientific topics.
a search engine that combines reference tools like an
encyclopedia, atlas and almanac.
Pipl brings together profiles, public records, and documents to serve
up relevant information about people.
Tap into these databases to access government
information, business data, demographics, and beyond.
looking for US government information, tap into this tool
that searches multiple databases at a time.
- Health Finder:
makes medical information easily accessible for
healthcare professionals. Try also BioTech Info for access to biomedical and genomic information
This database from Georgetown offers resources relating to medieval
Through this arts database, you'll be able to find works at the Louvre,
inventory from the Department of Prints and Drawings, American works in
France, and works in French museums.
database links to thousands of scholarly resources.
Find documents from the US Department of Commerce in this database.
Patent Full-Text and Image Database: Get
full-page patent images with this database.
Lunch: Through this database, you can get
economic data for free.
database, you'll find loads of information on businesses.
(http://www.tui.edu/library/dbtitle.asp) Check out this list to find both open and closed access databases for
With this service from the New York Public Library, you can search
multiple databases at once, and even narrow down your databases to a
specific type or subject.
Plants: Check out the USDA's plants database
to get standardized information about plants the live in the US.
database, you'll find data for regional economic conditions.
Electronic Reading Room: In this database, you
can search for CIA documents that have been declassified.
specializes in industrial products and processes.
This service of the US National Library of Medicine offers millions of
citations from journals and articles.
a searchable database that offers more than 2,000 texts.
Search this database for information on government officials and
Consumer Products Safety Commission Recalled Products:
Research products that have been pulled off the shelves in this
Stop: Search for mappable geographic data on
International Data Base: This database is full
of demographics, world population information, and more.
access to journals, specialized databases, and more
reference tools for medical students
database, you'll get access to government grant opportunities.
World Tables: Find data on purchasing power
parity and income for 179 countries over 50 years.
Database and Synopses: Use this database to
research aviation accidents.
Press Release Database: Find press releases
from the European Union in this database.
GDB Human Genome Database: This database
offers resources for genomic segments, people, citations, and other
find a database of over 20,000 books with full text.
cases, legal news, and more in this database.
in information has public records, business information,
unpublished opinions, and so much more.
National Archives: The National Archives
offers lots of databases and records for research.
lots of information about nonprofits, including fiscal
of Congress' THOMAS database, you can search Congressional
documents like bills, nominations, and voting records.
Find information about advertising agencies with this searchable
If you're looking for something specific, but just
don't know where to find it, these catalogs will offer some assistance.
Online Catalog: Using this catalog, you can
search for just about every book out there.
Prints and Photographs Online Catalog:
Go beyond Google's Image Search to find specific current and historical
images with this catalog.
of Knowledge: Search the Smithsonian
Institution Libraries for digital content, books, images, and more.
harvests digital resources, including text, image, and
Art: You can find pieces in the
National Gallery of Art's collection with this catalog.
This catalog has full-text, peer-reviewed content from hundreds of
In this catalog, you'll be able to search for records of works
registered with the US Copyright Office.
Gutenberg: This searchable catalog offers
nearly 20,000 full text books for free.
has more than 1 million records, many of which have links
to full text.
of Congress' sound collection has more than 2.5 million
audio recordings from both published and unpublished sources.
Public Library: Search the catalog of the
Internet Public Library to find the information you need.
Congress: Search more than 2 million volumes
in this legal collection.
This catalog of Internet resources covers every academic subject area.
to Library Catalogs: This gateway offers links
to hundreds of university and organizational catalogs.
Get hand-picked links to high quality research sources
with these directories.
This deep web directory will connect you with more than 70,000
databases and search engines.
of Primary Sources: This directory points to
sites that have great sources for researchers.
This directory is put together by librarians, offering a searchable,
human-reviewed gateway to quality sites in the visible and invisible
- Bureau of
Justice Statistics: This directory covers
legal and judicial statistics.
of Labor Statistics:
In the Bureau of Labor Statistics directory, you'll be able to find
information about employment, industries, occupations, and lots more.
Directory: Check out this searchable directory
to find information on US hospitals.
Statistics: This directory offers
statistics for aviation accidents.
Press: In this directory, you can search for
thousands of books and PDFs.
Portal: In this portal, you'll find searchable
journals, library gateways, and more.
Foreign Policy: This directory offers
statistical tables for foreign policy.
data directory is home to more than 200,000 data files.
of Open Access Journals: Find resources from
more than 3100 journals with this resource.
Another librarian-maintained site, this one features links to both
content and databases.
you'll get access to topic-specific databases and search
a searchable directory of selected science web sites.
of Internet resources makes it easy to access scholarly
databases, journals, books, discussion sessions, and lots more.
on the hunt for public records, check out SearchSystems'
Social Media and More
Social media sites are a great way to find content
that's obscure or
hasn't quite made it to the search engines yet. Use these tools and
more to round out your arsenal.
media site offers a recommendaton system for site discovery.
tool allows you to search deep web databases from within
content on this index.
reference links to resources for teaching, education,
libraries, and more.
Digg users submit content that search engines don't find, and often
share links before search engines index them.
World Factbook: Find country profiles, flags
of the world, and other international information in this searchable
bookmarking tool offers searchable tags.
Use these guides to learn how to fine-tune your search
on the invisible web.
Ultimate Guide to the Invisible Web: Learn
about the details of the invisible web and get suggestions for finding
invisible content with this guide.
the Invisible Web: This guide
provides information about the invisible and links to helpful resources.
the Invisible Web: This guide
discusses using databases to search the invisible web.
Invisible Web: This article discusses the
invisible web and how you can use specific resources to find what you
Deep Web: This guide quickly discusses the
deep web and offers a few tips for finding deep web information.
Web: This resource from Berkeley's
library discusses the invisible web and tools you can use to search it.