National drug code directory.

Vols. for 1970-1972 published by the Public Health Service; 1976- by the Public Health Service, Food and Drug Administration; 1980- by the U.S. Dept. of Health and Human Services, Public Health Service, Food and Drug Administration.Issues for <1976-> published in 2 v.; suspended 1986-1994.Issue for Oct. 1969 preceded by a prototype issue dated Apr. 1968.Vols. for 1980-198 kept up to date by quarterly supplements.Mode of access: Internet.Issues for 1971-1972 prepared by: the Office of Scientific Coordination, Bureau of Drugs, Food and Drug Administration; 1976-1985 by: the Drug Listing Branch, Food and Drug Administration; 1995- by: Product Information Management Branch, Division of Management and Budget, Center for Drug Evaluation and Research, Food and Drug Administration.Electronic serial mode of access: World Wide Web via the Center for Drug Evaluation and Research site.Vols. for 19 -1976 kept up to date by: Supplement to the ... National drug code directory, which ceased with v. 1, no. 36, Mar. 1981