TY JOUR TI HOLSTEIN BREED LACTATION YIELD IN THE SOUTHERN FOREST-STEPPE ZONE OF PRE-URAL KW cow KW breeding KW exterior KW productivity KW milk yield JO Bulletin Samara State Agricultural Academy AU Mudarisov, R.M. AU Khakimov, I.N. AU Semenov, V.G. AU Kulmakova, N.I. PY 2020 IS 5 PB Samara State Agricultural Academy