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THE COAL-FORMING ENVIRONMENT AND OCCURRENCE REGULARITIES OF SHANXI FORMATION AT THE EAST FLANK OF JIOULISHAN MINE AREA IN XUZHOU COALFIELD
1991, 19(3): 2-7.
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THE STUDY OF LATE CARBON-IFEROUS-EARLY PERMIAN FLORA AND PALAEOCOLOGY IN ZIBO COALFIELD OF SHANDONG PROVINCE
1991, 19(3): 9-14.
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A PRELIMINARY APPLICATION ON COAL SEAM CORRELATION BY GRAYSYSTEM THEORY
1991, 19(3): 23-27.
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AN ENGINEEYING GEOLOGIC EVALUA- TION OF STABILITY FOR ROOF AND FLOOR OF COAL SEAM BY FUZZY CLUSTER ANALYSIS
1991, 19(3): 47-51.
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COMPREHENSIVE APPLICATION OF VLF EM, EP AND VES SEEKING FISSURE WATER IN BASEMENT ROCK
1991, 19(3): 52-57.
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HD ATJUSTABLE JET REVERSE CIRCULATION CORING TOOL
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1991, 19(3): 61-64.
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