Effect of Different Photoperiods on Blood Hormone of Laying Hens
HUANG Ren-lu;CHEN Hui;DI Ke-qian;ZHANG Jing-qian;LI Jun-qiao;ZHANG Zhen-hong;PAN Dong
ACTA VETERINARIA ET ZOOTECHNICA SINICA . 2008, (3): 368 -371 .