Reproductive performance of boars on Swine Industrial Farm at Wielbark in Successive month and seasons of 1979/1980 farming year
RU
Reproduktivnye kachestva khrjakov na promyshlennojj otkormochnojj svinoferme Vel'bark v ocherednykh mesjacakh i sezonakh khozjajjstvennoga goda 1979/1980