Some innovations in equipment for scaling high roofs and mine walls /

Bibliographic Details
Main Authors:	Brown, Brinton C. (Author), Wright, Fred D. (Author), Ballinger, Homer J. (Author)
Format:	Government Document eBook
Language:	English
Published:	[Washington, D.C.] : United States Department of the Interior, Bureau of Mines, 1950.
Series:	Report of investigations (United States. Bureau of Mines) ; 4739.
Subjects:	Coal mines and mining > Equipment and supplies.
Online Access:	https://purl.fdlp.gov/GPO/gpo91712

Available Online