[Beginning and development of artificial insemination of animals in Shumen District].
D000818:Animals; D000829:Animals, Domestic; D002031:Bulgaria; D049673:History, 20th Century; D007315:Insemination, Artificial / Q000266:history / Q000662:veterinary*
Nachalo i razvitie na izkustvenoto osemeniavane na zhivoti v Shumenski okrŭg.