A field study relating geochemical environment to health and disease.
D000818:Animals; D000013:Congenital Abnormalities / Q000453:epidemiology / Q000662:veterinary; D004777:Environment; D004782:Environmental Health; D004812:Epidemiologic Methods; D004813:Epidemiology; D005843:Geography; D055593:Geological Phenomena; D005844:Geology; D006306:Health Surveys; D006801:Humans; D008377:Maps as Topic; D008923:Missouri; D012987:Soil; D013552:Swine; D013553:Swine Diseases / Q000453:epidemiology
D012987:Soil