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Geophysical and Geochemical Exploration  1993, Vol. 17 Issue (5): 398-400,340    DOI:
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STUDIES ON USING DIRECT WAVE TO EXTRACT PARAMETERS OF THE LOWVELOCITY ZONE
Ju Xinghua
China Inttittste of Coalfield Geophysical Erploration, Zhuozhou, Hebei Province, 072572
京ICP备05055290号-3
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