Effects of Addition of Probiotics on Egg White Index and Egg Yolk Index of Spent Laying Hens. ANGON : J. Anim. Sci. Tech. [Internet]. 2020 Jul. 7 [cited 2025 Nov. 1];2(2):139-46. Available from: https://jnp.fapet.unsoed.ac.id/index.php/angon/article/view/122