A trace element survey in the Transkei.
D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000188:drug therapy / Q000453:epidemiology*; D003035:Cobalt / Q000032:analysis; D003300:Copper / Q000032:analysis; D003677:Deficiency Diseases / Q000188:drug therapy / Q000453:epidemiology / Q000662:veterinary; D008099:Liver / Q000032:analysis*; D008274:Magnesium / Q000032:analysis; D008345:Manganese / Q000032:analysis; D013019:South Africa; D014131:Trace Elements / Q000032:analysis*; D015032:Zinc / Q000032:analysis
D014131:Trace Elements; D003035:Cobalt; D008345:Manganese; D003300:Copper; D008274:Magnesium; D015032:Zinc