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