Egg Quality, Fertility and Hatchability of Laying Quails Fed Diets Supplemented with Organic Zinc, Chromium Yeast or Mannan Oligosaccharides

Laila D. Abd El-Samee, I. El-Wardany, Nematallah G. Ali and O.M. Abo-El-Azab

International Journal of Poultry Science 11 ( 3 ): 221 - 224 , 2012