by authority of the United States Pharmacopeial Convention, Inc. By authority of the United States Pharmacopoeial Convention, Inc. By authority of the United States Pharmacopoeial Convention, Inc., meeting at Washington, D.C. The United States Pharmacopeial Convention, Inc. : United States Pharmacopeial Convention. By authority of the United States Pharmacopoeial Convention, Inc., meeting at Washington, D.C., April 17-19, 1980. United States Pharmacop秈al Convention.