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VERTEBRATE BIOSTRATIGRAPHY OF THE LOWER CRETACEOUS YIXIAN FORMATION IN LINGYUAN, WESTERN LIAONING AND ITS NEIGHBORING SOUTHERN NEI MONGOL (INNER MONGOLIA), CHINA
WANG Xiao-Lin, WANG Yuan-Qing, ZHANG Fu-Cheng, ZHANG Jiang-yong, ZHOU Zhong-He, JIN Fan, HU Yao-Ming, GU Gang, ZHANG Hai-Chun
Vertebrata Palasiatica . 2000, (02): 81 -99 .