Cover Image

Effectiveness of bleeder entries in ventilating pillared areas of bituminous-coal mines /

Bibliographic Details
Main Authors: Kingery, D. S. (Donald Samuel) (Author), Dornenburg, D. D. (Author)
Format: Government Document eBook
Language:English
Published: [Washington, D.C.] : United States Department of the Interior, Bureau of Mines, 1957.
Series:Report of investigations (United States. Bureau of Mines) ; 5360.
Subjects:
Mine ventilation.
Online Access:https://purl.fdlp.gov/GPO/gpo91532
Description
Item Description:"Work on manuscript completed August 1956."
"September 1957."
Physical Description:1 online resource (ii, 24 pages) : illustrations.