skip to content
Search
Search U.S. government technical reports digitized or harvested by
TRAIL
.
Keyword Search
Enter your search term(s):
[advanced search]
1 result returned
Browse TRAIL Inventories
(opens in new tab)
Search results
Experimental longwall mining in a Pennsylvania anthracite mine (in two parts).
Refine your search results
Published Year
1960-1969 (1)
Subject
Anthracite coal--Pennsylvania (1) *
Coal-mining machinery--Evaluation (1)
Longwall mining--Pennsylvania (1)
Mining machinery--Evaluation (1)
Author
Brennan, Robert J. (1) *
Malenka, Wilbert T. (1)
