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Falls of roof in bituminous coal mines : influence of seasons and rate of production.

Bibliographic Details
Other Authors:	Paul, J. W. (James Washington)
Format:	Government Document eBook
Language:	English
Published:	[Washington?] : U.S. Government Printing Office, 1929.
Series:	Mines Bur. Technical Paper No. 410 (rev.)
Subjects:	Coal mines and mining. Electronic books.
Online Access:	Connect to the full text of this electronic document

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