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Oxford Reference Online - Science
Contains the complete texts of Oxford University Press dictionaries, encyclopedias, and other reference titles.

Science Reference Source
Science magazines, biographies, encyclopedias, reference books, scholarly journals, and country fact sheets. Also includes images and videos.
Science Reference Center contains full text for hundreds of science encyclopedias, reference books, periodicals and other reliable sources. In addition, the database includes a vast collection of images from sources such as UPI, Getty, NASA, National Geographic and the Nature Picture Library.

Grzimek's Animal Life Encyclopedia by Gale Research Staff; Michael Hutchins
ISBN: 9780787653620
Publication Date: 2002
Online version of the 17-volume set from Gale (2004). In cooperation with the American Zoo and Aquarium Association.

Oxford Reference Online - Medicine
Contains the complete texts of Oxford University Press dictionaries, encyclopedias, and other reference titles