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
A study of mine roof of the coking district of Western Pennsylvania
Refine your search results
Published Year
1930-1939 (1)
Subject
Coal mines and mining--Pennsylvania (1)
Coke--Pennsylvania (1)
Industrial accidents--Pennsylvania (1)
Mine safety--Pennsylvania (1) *
Author
Paul, J. W. (1)
Plein, Leopold Nicholas, (1) *
