Tutkun, Muhittin, Muzaffer Denli, and Ramazan Demirel. 2018. “Productivity and Egg Quality of Two Commercial Layer Hybrids Kept in Free-Range System”. Turkish Journal of Agriculture - Food Science and Technology 6 (10):1444-47. https://doi.org/10.24925/turjaf.v6i10.1444-1447.2070.