National Agricultural Library (United States). Biotechnology Information Center
Beltsville, MD: Biotechnology Information Center, National Agricultural Library, 1997 May; 17 p. [Online]. Available: http://www.nal.usda.gov/bic/Misc_pubs/avfile97.html [26 November 2003]
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Joint Collection Development Policy Statement of the National Library of Medicine, the National Agricultural Library, and the Library of Congress: Biotechnology National Library of Medicine (United States); and National Agricultural Library (United States); and Library of Congress (1989-09)