00552naa#a2200181#i#450# EN\\bibl\10567 20250219005441.3 2073-0462 20151225b2015####ek#y0engy0150####ca RUS RU AN IMPACT OF THE TECHNICS OPERATING LEVEL ON INDICES OF TRACTOR USAGE IN AGRICULTURAL PRODUCTION Journal article Kazan Kazan state agrarian University 2015 2 с. Journal article local Galiev Ilgiz Gakifovich Khusainov Rail zh-szf.ru