New Discovery of the Middle Pleistocene Mammal Fossils in theYuxian Basin, the North of Hebei Provice, China

• YUN Jie, 
• ZHAO Liying, 
• YUE Feng, 
• LU Yanming, 
• LI Guangdong, 
• Gao Shang, 
• HE Li, 
• ZHOU Mingxing, 
• ZHANG Yaguang, 
• ZHANG YUNqiang