title: Correspondence: The use of vasectomised bulls.
mesh_terms: D000818:Animals; D002417:Cattle; D007315:Insemination, Artificial / Q000662:veterinary; D008297:Male; D010413:Penis / Q000601:surgery; D012756:Sheep; D013552:Swine; D014659:Vasectomy / Q000662:veterinary*