- National Library of Medicine
- www.nlm.nih.gov
- US national provider of health-related library and information services.
4.7
(si*)
>5490
>70
8
- National Institutes of Health Library
- nihlibrary.nih.gov
- Serving the US National Institutes of Health, with self-service access to others.
4.2
(si*)
>20
<10
6
- The National Transportation Library
- ntl.bts.gov
- Provides online access to documents and databases covering all aspects of transportation in the US. Material comes from public and private organizations and access is free.
4.1
(si*)
>20
>20
7
- Canada Institute for Scientific and Technical Information
- cisti-icist.nrc-cnrc.gc.ca
- Canadian research library for science, technology, engineering, and medicine.
4.0
(si*)
>10
<5
6
- U.S. Department of the Interior Library
- library.doi.gov
- Focusing on the natural and social sciences; law; economics; management and use of natural and cultural resources; and the cultures and well-being of American Indians and Native Alaskans.
3.8
(si*)
<5
-
6
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