[On the reproduction rate of farm animals in the Bulgarian People's Republic].
D000818:Animals; D002031:Bulgaria; D002417:Cattle; D004715:Endometriosis / Q000628:therapy / Q000662:veterinary*; D005260:Female; D005298:Fertility; D007315:Insemination, Artificial / Q000662:veterinary*
O vosproizvodstve sel'skokhoziaĭstvennykh zhivotnykh v Narodnoĭ Respublike Bolgarii.