1980 United States Pharmacopeia–National Formulary. The United States Pharmacopeial Convention. 1980. 1505 pp. 21 × 28.5 cm. Price $90.00 postpaid (domestic and foreign), including all annual supplements to USP XX and NF XV; separately, $65.00 for the book and $7.00 for the first supplement. (Available from Mack Publishing Co., 20th and Northampton Streets, Easton, PA 18042; orders also may be placed with state pharmaceutical associations.)