This is the third in a series of eight reports of a research study for the National Agricultural Library (NAL) on the effective utilization of bibliographic data bases in machine-readable form. It consists of about 750 references collected to provide background data for the seven technical tasks of the study. The bibliography is set up to correspond with each technical task and includes references on: (1) modes of interaction; (2) software, including available software packages; (3) vocabulary; (4) format problems; (5) standardization; (6) query translation and search strategy; (7) file organization; (8) national information networks; and (9) bibliographic data bases both in general and in regard to the specific data bases of Biological Abstracts, the U.S. Atomic Energy Commission, the Clearinghouse for Federal Scientific and Technical Information, Engineering Index, the Library of Congress, the National Library of Medicine, the Institute for Scientific Information, Pandex Inc., and Chemical Abstracts Service. (JW)