Unified Medical Language System (UMLS): January 1986 through December 1996 : 280 citations/prepared by Catherine R - Selden, C
Selden, Betsy L, Humphreys. -- Bethesda, Md. (8600 Rockville Pike, Bethesda 20894): US Dept of Health and Human Services, Public Health Service, National Institutes of Health, National Library of Medicine, Reference Section ; Pittsburgh, PA. Sold by the Supt of Docs, U. S. G. P. O., 1997. (Current bibliographies in medicine ; 96-98)