ÇOBAN Ö, LAÇİN E, GENÇ M. The Effect of Photoperiod Length on Performance Parameters, Carcass Characteristics and Heterophil/Lymphocyte-ratio in Broilers. Kafkas Univ Vet Fak Derg, 20 (6): 863-870, 2014. DOI: 10.9775/kvfd.2014.11186