Questions and answers on timbering bituminous coal mines.

Bibliographic Details
Other Authors:	Paul, J. W. (James Washington)
Format:	Government Document eBook
Language:	English
Published:	[Washington?] : U.S. Government Printing Office, 1928.
Series:	Miners' Circ. No. 31
Subjects:	Coal mines and mining. Electronic books.
Online Access:	Connect to the full text of this electronic document

Description
Item Description:	[On use of lumber to support mine roof] Record is based on bibliographic data in ProQuest U.S. Executive Branch Documents, 1910-1932. Reuse except for individual research requires license from ProQuest, LLC. Electronic resource.
Physical Description:	1 online resource (ii, 32 pages)
Format:	System requirements: PDF reader software.