Hai−Lu You, Kyo Tanoue, and Peter Dodson
Acta Palaeontologica Polonica 53 (2), 2008: 183-196 doi:http://dx.doi.org/10.4202/app.2008.0202
Key words: Dinosauria, Ceratopsia, Psittacosaurus, Cretaceous, Yixian Formation, Liaoning, China
Hai−Lu You [youhailu@gmail.com], Institute of Geology, Chinese Academy of Geological Sciences, 26 Baiwanzhuang Road, Beijing 100037, P.R. China; Kyo Tanoue [tanoue@sas.upenn.edu], Department of Earth and Environmental Science, University of Pennsylvania, 240 S. 33rd Street, Philadelphia, PA 19104−6316, USA; Peter Dodson [dodsonp@vet.upenn.edu], School of Veterinary Medicine and Department of Earth and Environmental Science, University of Pennsylvania, 3800 Spruce Street, Philadelphia, PA 19104−6045, USA.
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