Horizontal trajectories of rotary-drilled holes /

Bibliographic Details
Main Author:	Goodman, Tobias W.
Corporate Author:	United States. Bureau of Mines
Other Authors:	Cervik, Joseph
Format:	Government Document Book
Language:	English
Published:	[Pittsburgh, Pa.] : U.S. Dept. of the Interior, Bureau of Mines, [1988]
Series:	Report of investigations (United States. Bureau of Mines) ; 9177.
Subjects:	Boring. Coal mines and mining.
Online Access:	https://purl.fdlp.gov/GPO/LPS97972

Description
Item Description:	Title from title screen (viewed on July 23, 2008). Electronic resource.
Physical Description:	11 pages : digital, PDF file.
Format:	Mode of access: Internet at the National Institute for Occupational Safety and Health web site. Address as of 7/23/08: http://www.cdc.gov/niosh/mining/pubs/pdfs/ri9177.pdf ; current access available via PURL.