(1)
Ramadan , N. A.; Omar, A. S.; Bahakaim, A.; Osman, S. M. Effect of Using Different Levels of Iron With Zinc and Copper in Layer’S Diet on Egg Iron Enrichment. Int. J. Poult. Sci. 2010, 9 (9), 842–850. https://doi.org/10.3923/ijps.2010.842.850.