United States Pharmacopeial Convention The united states pharmacopeia the national formulary USP 31 NF 26 2008 [Book] United States Pharmacopeial Convention. - The United States Pharmacopeial Convention USA - Vol. 3 . All. ISBN: 1889788546 Subjects--Topical Terms: Pharmacopoeias--United States--Databases Dewey Class. No.: 615