title: More on zinc and copper in dairy rations.
authors.forename: T W
authors.initials: TW
authors.lastname: Graham
authors.forename: C L
authors.initials: CL
authors.lastname: Keen
mesh_terms: D000821:Animal Feed / Q000009:adverse effects*; D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000139:chemically induced*; D003300:Copper / Q000097:blood / Q000172:deficiency*; D004912:Erythrocytes / Q000201:enzymology; D013482:Superoxide Dismutase / Q000097:blood; D015032:Zinc / Q000506:poisoning*
chemical_list: D003300:Copper; D013482:Superoxide Dismutase; D015032:Zinc