Hawley M E
Coal, part 1 : social, economic and environmental aspects - Pennsylvania Dowden Hutchinson And Ross 1976 - 384 Pages - Benchmark papers on energy .
Coal industry
Earth science
551 / HAW/CO
Coal, part 1 : social, economic and environmental aspects - Pennsylvania Dowden Hutchinson And Ross 1976 - 384 Pages - Benchmark papers on energy .
Coal industry
Earth science
551 / HAW/CO