Mining methods and costs at Spring Hill mine, Montana Mines Corporation, Helena, Mont.

Bibliographic Details

Corporate Author:	Montana Mines Corp
Other Authors:	Pierce, A. L.
Format:	Government Document eBook
Language:	English
Published:	Washington, D.C. : [publisher not identified], 1931.
Series:	Mines Bur. Info. Circ. No. 6402
Subjects:	Mines and mineral resources. Electronic books.
Online Access:	Connect to the full text of this electronic document