UNITED STATES PHARMAKOPEIA 195,289 The United States Pharmacopeia : USP 19 / by authority of the United States Pharmacopeial Convention, Inc., meeting at Washington, D.C. April 8-10, 1970. - Rev. 19, official from July 1, 1975. - Rockville : United States Pharmacopeial Convention, Inc., cop. 1974. - X L I X , 824, [1] s. ; 30 cm