Effect of protein and vitamin A intake of sheep on numbers of the sheep ked, Melophagus ovinus L.
D000818:Animals; D004044:Dietary Proteins / Q000494:pharmacology*; D012756:Sheep; D012757:Sheep Diseases; D013987:Ticks; D014801:Vitamin A / Q000494:pharmacology*; D014802:Vitamin A Deficiency
D004044:Dietary Proteins; D014801:Vitamin A