Yugan, Jin. Permian Brachiopoda and Paleogeography of the Qinghai-Xizang (Tibet) Plateau. Jin Yugan. In Paleontologia Cathayana: An English Journal of Palaeontology and Stratigraphy , Paleontologia Cathayana: An English Journal of Palaeontology and Stratigraphy. 54 s. : .