Mining methods and costs at Pilares mine, Pilares de Nacozari, Sonora, Mexico.

Bibliographic Details

Other Authors:	Leland, Everard
Format:	Government Document eBook
Language:	English
Published:	Washington, D.C. : [publisher not identified], 1930.
Series:	Mines Bur. Info. Circ. No. 6307
Subjects:	Mines and mineral resources. Electronic books.
Online Access:	Connect to the full text of this electronic document