The Effects of Calcium and Vitamin D₃ in Diet on Plasma Calcium and Phosphorus, Eggshell Calcium and Phosphorus Levels of Laying Hens in Late Laying Production Period

S. Canan Bolukbasi, Saban Celebi and Necati Utlu

International Journal of Poultry Science 4 ( 8 ): 600 - 603 , 2005