00682naa#a2200193#i#450# EN\\bibl\1124 20241112005925.2 2073-0462 20140113b2014####ek#y0engy0150####ca RUS RU The egg production of laying hens of cross of “hisex brown” at use of feed additives premix vitamin-mineral and PVMC (an example of “Stepnaya” poultry farm of Narimanov region of Astrakhan region) Journal article Kazan Kazan state agrarian University 2014 4 с. Journal article local Dulina Anna Lazko Marina Udalova Oksana naukaru.ru