[E. Aehnelt and bovine artificial insemination in Northwest of Germany].
D000821:Animal Feed; D000818:Animals; D002417:Cattle; D005260:Female; D005860:Germany, West; D007315:Insemination, Artificial / Q000662:veterinary*; D008297:Male; D011247:Pregnancy
E. Aehnelt und die nordwestdeutsche Rinderbesamung.