Cover Image

Mechanically driven level rock tunnel.

Bibliographic Details
Corporate Author: Colony Coal Co
Other Authors: Bryson, W. D.
Format: Government Document eBook
Language:English
Published: Washington, D.C. : [publisher not identified], 1932.
Series:Mines Bur. Info. Circ. No. 6598
Subjects:
Tunnels.
Electronic books.
Online Access:Connect to the full text of this electronic document
Description
Item Description:[On methods used at mine of Colony Coal Company, Dines, Wyo.; with data on costs]
Record is based on bibliographic data in ProQuest U.S. Executive Branch Documents, 1910-1932. Reuse except for individual research requires license from ProQuest, LLC.
Electronic resource.
Physical Description:1 online resource (4 pages)
Format:System requirements: PDF reader software.