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
Design and development of drill equipment
Refine your search results
Published Year
1960-1969 (1)
Subject
Boring machinery (1) *
Coal mines and mining (1)
Mine ventilation (1)
Author
Cervik, Joseph, (1)
Hadden, J. D. (1) *
