The effect of feeding supplemental vitamin A and zinc to steers on pasture /
Smith, W. H.(William H.),1929-author.
Perry, Tilden Wayne,author.
Beeson, W. Malcolm(William Malcolm),1911-1988,author.
Mohler, M. T.,author.
Purdue University.Agricultural Experiment Station.
Caption title.
"March, 1964."
Beef cattle
Vitamin A in animal nutrition.
Zinc
Beef cattle
Vitamin A in animal nutrition.
Zinc