by Peter Franzen , Minna Gill , Lillian Crans , Arthur Fisher , Alessandro Molinari , John Roberts , Hermann Tiefenbach , Oscar G. Mayer , Roy F. Hendrickson , Swift & Company , Grand Rapids Association of Commerce , Armour and Company , Institute of American Meat Packers , United States. Bureau of Agricultural Economics. Division of Live Stock, Meats, and Wool , Livestock and Meat Council , American Meat Institute , United Packinghouse Workers of America. Research Department