Coal and metal mining
By: edited by Harry M. Crain.
Contributors: Crain, Harry M.; Colorado School of Mines.; Conference on Coal Mining and MetalMining (1949 : Colorado School of Mines)
Series: Quarterly of the Colorado Schoolof Mines -- vol.45, no.2B; Quarterly (Colorado School of Mines) -- vol.45, no.2B.
Publisher: Colorado School of Mines
Published: 1950
Place of publication: Golden, Col
Language: eng
Notes: "Papers delivered at the Conference on Coal Mining and Metal Mining, September 30 and October 1, 1949..."