The Histologic Characters of Testis in Aging Yak
YUAN Li-gang，ZHU Jun-feng，GU Lai-feng，YAN Zhen-long
ACTA VETERINARIA ET ZOOTECHNICA SINICA . 2015, (5): 855 -862 .  DOI: 10.11843/j.issn.0366-6964.2015.05.024