TY JOUR TI THE METHOD COMPARATIVE EFFICIENCY FOR DETERMINATION OF HOLSTEIN BREED BULL-PRODUCER PREPOTENCY KW black-and-white breed KW Holstein breed KW prepotency KW milk yield KW fat mass fraction in milk KW statistical values JO Bulletin of KSAU AU Nazarchenko, O.V. AU Kakhikalo, V.G. PY 2013 IS PB Krasnoyarsk State Agrarian University