TY  JOUR
TI  Length of productive life the cows of Simmental breed
KW  length of productive life
KW  age of culling
KW  milk production
KW  lifetime productivity
KW  correlation parameter
KW  Simmental breed
JO  Agrarian Bulletin of the
AU  Ignat'eva, L.P.
AU  Sermyagin, A.A.
PY  2021
IS  213
PB  Ural State Agrarian University