00457naa#a2200169#i#450# EN\\bibl\591 20260331060902.2 2073-0462 20131024b2013####ek#y0engy0150####ca RUS RU Small farms cooperation - historical parallels Journal article Kazan Kazan state agrarian University 2013 3 с. Journal article local Mamaev Renat zh-szf.ru