Mining methods and costs at metal mines of U.S.

Bibliographic Details

Other Authors:	Wright, Charles Will, 1879-
Format:	Government Document eBook
Language:	English
Published:	Washington, D.C. : [publisher not identified], 1931.
Series:	Mines Bur. Info. Circ. No. 6503
Subjects:	Mines and mineral resources. Electronic books.
Online Access:	Connect to the full text of this electronic document