Xu, Jj, Cz Ren, Ss Wang, Dd Liu, Lq Cao, and Jp Tao. 1. “Protection Efficacy of Multivalent Egg Yolk Immunoglobulin Against Eimeria Tenella Infection in Chickens.”. Iranian Journal of Parasitology 8 (3), 449-58. http://ijpa.tums.ac.ir/index.php/ijpa/article/view/470.