TY - BOOK AU - Wali, Mohan K (Ed.) ED - International Congress for Energy and the Ecosystem.University of North Dakota TI - Ecology and coal resource development SN - 0-08-023863-7 U1 - 333.82 21st PY - 1979/// CY - New York PB - Pergamon Press KW - Coal-Congresses; Coal mines and mining-Congresses; Energy policy-Congresses; Environmental protection-Congresses N1 - v.2 ER -