Peng, Syd S. 1939- creator author. Ma, W. M. Zhong, W. L. text bibliography cou Littleton, Colorado Society for Mining, Metallurgy, and Exploration c1992 1992 monographic eng 161 pages : illustrations. Syd S. Peng. "Reviewed and supplemented by W.M. Ma and W.L. Zhong"--T.p. verso. Includes bibliographical references (pages 155-158) and index. Mine subsidences Subsidencias en minas Ground control (Mining) Control de tierras (Minería) 622 0873351142 DLC 241115 20250825175130.0 u6418