TY JOUR TI Reproductive qualities of hybrid sows at crossing with Duroc boars KW technology KW breed KW hybrids KW sows F1 KW Duroc breed KW multiple pregnancy KW safety KW large-fruited. JO Agrarian Bulletin of the AU Kazanceva, N.P. AU Krasnova, O.A. AU Vasil'eva, M.I. AU Hardina, E.V. PY 2020 IS 199 PB Ural State Agrarian University