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4、2(3):377-385.6 Cheng D D , Liu S X,Qu J P. Study on the habitat and classification of the native dawn redwoods in Lichuan, Hubei, China C / In : LePage B A , Williams C J,Lai X L (eds.) . International Metasequoia Symposium. China University of Geosciences , Wuhan , 2002,9-10.7 Xiaojun Du,Qinfeng Gu
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