State Department. Supplemental estimate, Department of State, 1931, Conference on Limitation of Manufacture of Narcotic Drugs, supplemental estimate of appropriation for Department of State, fiscal year 1931, to remain available until June 30, 1932, for expenses of participation by Government of United States in Conference on Limitation of Manufacture of Narcotic Drugs to be held at Geneva, Switzerland, on May 27, 1931.