UNITED 804,426 The United States Pharmacopeia : 23 revision. The National Formulary : 18 ed. / by authority of the United States Pharmacopeial Convention, Inc. ; prep, by the C o m m , of Revision and publ. by the Board of Trustees. - Rockville, M D : The USPhC, Inc., 1994. - 28 c m Suppl. I : Official January I 1995, except where otherwise noted, released November I 1994. - S. 2393-2594 Suppl.2 : Official May 15, 1995, except [...] released May 15, 1995. - S. 2595-2850 ISSN 0195-7996