[Studies concerning the etiology of retained placenta in cattle].
D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000209:etiology*; D005260:Female; D010921:Placenta Accreta / Q000209:etiology / Q000662:veterinary*; D011247:Pregnancy
Untersuchungen über die Atiologie der Retentio secundinarum beim Rind.