How to prevent death and injury from falls of roof in coal mines.

Bibliographic Details

Other Authors:	Paul, J. W. (James Washington)
Format:	Government Document eBook
Language:	English
Published:	Washington, D.C. : [publisher not identified], 1932.
Series:	Mines Bur. Info. Circ. No. 6570
Subjects:	Accidents. Electronic books.
Online Access:	Connect to the full text of this electronic document