BIOLOGY

• Agricola. Beltsville: National Agricultural Library, 1970–. A database of books, articles, and documents on agriculture, including veterinary science, entomology, plant sciences, forestry, aquaculture and fisheries, farming and farming systems, agricultural economics, and nutrition. Searches can be limited to books in the National Agricultural Library, to articles, or both. The database is available free at <http://agricola.nal.usda.gov>.
• Biological Abstracts. Philadelphia: Biosis, 1926–. The most thorough index to biological literature, with more than 5 million records of biology research. The electronic version of this work is called BIOSIS.
• Biological and Agricultural Index. New York: Wilson, 1964–. An index to about 300 basic journals in biology and agriculture. This work is available in both print and electronic formats. In some libraries, abstracts and full text of selected articles are included.
• CSA Biological Sciences. Bethesda: Cambridge Scientific Abstracts, 1994–. Provides citations and abstracts to the contents of over 6,000 biology journals as well as selected conference proceedings and books, covering publications from 1982 to the present.

• Animal Diversity Webhttp://animaldiversity.ummz.umich.edu/site/index.html Provides information on animals: mammals, birds, amphibians, reptiles, sharks, bony fish, mollusks, arthropods, and echinoderms. Each animal is classified by phylum, order, class, and family; pictures, sounds, and background information are provided for many of them. The site is a service of the University of Michigan Museum of Zoology.
• National Center for Biotechnology Informationhttp://www.ncbi.nlm.nih.gov Provides highly technical molecular biology information and tools. The site includes molecular databases, nucleotide and protein sequences, and genome databases as well as links to the PubMed database of medical research and PubMed Central, an archive of full-text life sciences journals. The center is part of the U.S. National Library of Medicine.
• Tree of Life Web Projecthttp://tolweb.org/tree/phylogeny.html A collaborative project compiled by biologists around the world. The site offers more than 1,300 schematic trees that map biological relationships and provide information about organisms. Detailed bibliographies are inlcuded.
• WWW Virtual Library: Bio Scienceshttp://www.vlib.org/Biosciences.htmlAn index to several Virtual Library pages related to biology, with links to biodiversity and ecology, biotechnology, botany, cell biology, medicine, zoology, and more.

• Encyclopedia of Human Biology. Ed. Renato Dulbecco. 2nd ed. 9 vols. San Diego: Academic Press, 1997. Offers substantial articles on topics in human biology, including behavior, biochemistry, genetics, psychology, and medical research. The final volume includes an index to the set.
• Encyclopedia of Microbiology. Ed. Joshua Lederberg. 2nd ed. 4 vols. San Diego: Academic Press, 2000. Covers topics in microbiology, reviewing research in such areas as bacteriophages, anaerobic respiration, and AIDS. The articles, written for the informed nonspecialist, are substantial and include bibliographies.
• Fieldbook of Natural History. Ed. E. L. Palmer and G. A. Parker. 2nd ed. New York: McGraw-Hill, 1975. A handy compilation of information on the natural world, devoted chiefly to the description of plants and animals with some information on their environment and behavior. The work is arranged by topic with an alphabetical index.
• Grzimek's Animal Life Encyclopedia. Ed. Bernhard Grzimek. 2nd ed. 17 vols. Detroit: Gale Group, 2003–04. A survey of animals, organized by taxonomic class. Entries discuss species' distribution, behavior, and appearance; the work includes numerous color plates.
• Oxford Companion to Animal Behavior. New York: Oxford University Press, 1982. Offers short articles, arranged alphabetically, covering topics in ethnology, defining terms, and discussing theories and discoveries in the field.
• Walker's Mammals of the World. By Ronald M. Nowak. 6th ed. 2 vols. Baltimore: Johns Hopkins University Press, 1999. Describes the appearance, habitat, behavior, and biology of every genus of living mammal. The work is arranged taxonomically.