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Grabau, Amadeus W.; King, Sohtsu C. Shells of Peitaiho 2 2nd ed. revised and enlarged. Peking Laboratory of Natural history. 1928: 239–243 （英语）.
Grabau, Amadeus W.; King, Sohtsu C. Shells of Peitaiho 2 2nd ed. revised and enlarged. Peking Laboratory of Natural history. 1928: 239–243 （英语）.