@article{paperid:1021699, author = {Kermanshahi, Hassan and E. Haji Agha Jani and Hashemipour, Hamideh and Pilevar, Mohammad}, title = {Efficacy of natural zeolite and pigments on yolk color and performance of laying hens}, journal = {African Journal of Biotechnology}, year = {2011}, volume = {10}, number = {16}, month = {April}, issn = {1684-5315}, pages = {3237--3242}, numpages = {5}, keywords = {natural zeolite; pigment; yolk color; laying hens}, }