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A parataxonomic revision of spheroolithid eggs from the Upper Cretaceous Quantou Formation in Changtu, Liaoning
LIU Jin-Yuan, WANG Qiang, ZHAO Zi-Kui, WANG Xiao-Lin, GAO Chun-Ling,SHEN Cai-Zhi
Vertebrata Palasiatica . 2013, (4): 278 -288 .