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12h0014853 20120724133552.0 d20092011cc br p r 0 a0eng | 1674-5264 NGL a706 Mining science and technology. Xuzhou, Jiangsu : Elsevier , 2009-2011. 21 v. : ill. ; 30 cm. Vol.19 No.1- (Jan. 2009)-v.21 (2011). Description based on Volume 19, issue 1 (January 2009) Mining engineering Periodicals. Journal of China University of Mining & Technology 1006-1266 International journal of mining science and technology 2095-2686 aCN bNGL NGL P 706 J82u suyx0901