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STUDY OF BIOSTRATIGRAPHIC CORRELATION OF THE LATE PERMIAN COAL SEAMS IN GUIZHOU AND GUANGXI PROVINCE
1995, 23(6): 1-5.
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1995, 23(6): 12-19.
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1995, 23(6): 24-31.
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1995, 23(6): 38-42.
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1995, 23(6): 43-47.
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1995, 23(6): 47-50.
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1995, 23(6): 51-54.
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1995, 23(6): 57-61.
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1995, 23(6): 62-66.
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