Rock bursts in Lake Superior copper mines, Keweenaw Point, Mich.

Bibliographic Details

Other Authors:	Crane, Walter R. (Walter Richard), 1870-
Format:	Government Document eBook
Language:	English
Published:	[Washington?] : U.S. Government Printing Office, 1929.
Series:	Mines Bur. Bull. No. 309
Subjects:	Copper mines and mining. Electronic books.
Online Access:	Connect to the full text of this electronic document