UNITED 804,426 The United States Pharmacopedia 1995 : USP 23 : the National Formulary : N F 18 : official from January I, 1995 / by authority of the United States Pharmacopeial C o n ­ vention, Inc., meeting at Washington, D.C., March 8-10, 1990 ; Prep, by the C o m m , of Revision and publ. by the Board of Trustees. - Rockville, M D : United States Pharmacopeial Convention, Inc., [1994]. - LIX, 2391 s. ; 28 cm ISSN 0195-7996 ISBN 0-913595-76-4 (cloth)