1. Structural characteristics of the U.S. hog production industry;Van Arsdall,1978
2. Control and elimination of swine diseases through repopulation with specific pathogen-free (SPF) stock;Twiehaus,1975
3. Methods of disease control;Alexander,1981
4. Large volume hog production in the U.S.;Rhodes;University of Missouri-Columbia Agric. Expt. Station, SR 114,1975
5. Large and medium volume hog producers: A national survey;Rhodes;University of Missouri-Columbia Agric. Expt. Station, SR 223,1979