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
Ultrasonic convergence measurements
Refine your search results
Published Year
1980-1989 (1)
Subject
Coal mines and mining--Equipment and supplies--Safety measures (1)
Mine roof control (1)
Ultrasonic testing (1) *
Author
McVey, James R. (1) *
