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<br />Coal Mine <br />Ground Control <br />SYD S. PCNG, Ph.D. <br />Awd.le Profmv.oa CWlrmm of B11de~.aa t ProPr.. <br />w,. vim. um.~~~r <br />Ca4{e d Ml.enl wd Fae~ Naw~en <br /> <br />A WUBY•INTIiliSC1F.NCl: PUBLICATION <br />]OIBV WILEY ~ SONS, New York Chicheskr Brlabane Toronto <br /> <br />