Não informado. (1946). Annual cotton quality survey. U.S. Department of Agriculture, Production and Marketing.
Chicago-referens (17:e uppl.)Não informado. Annual Cotton Quality Survey. Washington: U.S. Department of Agriculture, Production and Marketing, 1946.
MLA-referens (8:e uppl.)Não informado. Annual Cotton Quality Survey. U.S. Department of Agriculture, Production and Marketing, 1946.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.