Studies of Roof Movement in Coal Mines. 1. Montour 10 Mine of the Pittsburgh Coal co.
Contributors: Greenwald, H.P.; Maize, E.R.; Hartmann, I.
Series: Report of investigations (United States. Bureau of Mines) -- 3355
Publisher: s.n
Published: 1937
Place of publication: S.l
Language: eng
Notes: 1