Effects of Phosphorus Level on Internal Secretion and Bone Density in Old Layers
YU Lu, WANG Ya-qian, ZHANG Shi-yuan, ZHOU Lian-gao, YAN Gui-qin, ZHANG Ying, LIN Xian-hua, GUO Xin-hua, YAN Han-han
ACTA AGRICULTURAE BOREALI-SINICA . 2008, (S1): 208 -212 .  DOI: 10.7668/hbnxb.2008.S1.050