United States. Department of Agriculture. Office of the Secretary. (1931). Control of Botrytis rot of pears with chemically treated wrappers. U.S. GPO.
Chicago Style (17th ed.) CitationUnited States. Department of Agriculture. Office of the Secretary. Control of Botrytis Rot of Pears with Chemically Treated Wrappers. Washington: U.S. GPO, 1931.
MLA (9th ed.) CitationUnited States. Department of Agriculture. Office of the Secretary. Control of Botrytis Rot of Pears with Chemically Treated Wrappers. U.S. GPO, 1931.
Warning: These citations may not always be 100% accurate.