Aglyulina A.R., Leutsky V.L.
AGE AND SEASONAL VARIABILITY OF NONSPECIFIC DEFENSE FACTORS OF BULL CALVES’ ORGANISM WHICH ARE FROM ECOLOGICALLY HETEROGENEOUS AREAS OF ORENBURG REGION ^{[№ 9 ' 2007]}
The influence of seasons, and also different ecological conditions on variability of factors of nonspecific defense of bull calves’ organism of different age groups (from birth till six-month) in comparison with control group from farms of Orenburg region.