Não informado. (1975). Cotton and wool situation. U.S. Department of Agriculture, Economic Research Service.
Chicago-referens (17:e uppl.)Não informado. Cotton and Wool Situation. Washington: U.S. Department of Agriculture, Economic Research Service, 1975.
MLA-referens (8:e uppl.)Não informado. Cotton and Wool Situation. U.S. Department of Agriculture, Economic Research Service, 1975.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.