title: Copper, iron, and zinc contents of pasture grass and serum of grazing cattle.
mesh_terms: D000818:Animals; D002417:Cattle / Q000378:metabolism*; D003300:Copper / Q000032:analysis* / Q000097:blood; D007501:Iron / Q000032:analysis* / Q000097:blood; D006109:Poaceae / Q000032:analysis*; D012621:Seasons; D015032:Zinc / Q000032:analysis* / Q000097:blood
chemical_list: D003300:Copper; D007501:Iron; D015032:Zinc