TY JOUR TI NON-CONVENTIONAL SOURCES OF PROTEIN EFFICIENCY IN COMBIFEEDS FOR LACTING COWS KW lactating cows KW rapeseed KW meal KW camelina KW meal KW milk KW milk production JO Bulletin Samara State Agricultural Academy AU Zoteev, V.S. AU Simonov, G.A. AU Pisarev, E.I. PY 2016 IS 1 PB Samara State Agrarian University