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重庆合川地区中二叠世晚期腕足动物多样性演变
曾勇,张鑫
Evolution of Brachiopod Diversity of the Late Middle Permian in the Hechuan Area of Chongqing
ZENG Yong, ZHANG Xin
现代地质 . 2007, (3): 479 -483 .