skip to content
Search
Search U.S. government technical reports digitized or harvested by
TRAIL
.
Keyword Search
Enter your search term(s):
[advanced search]
2 results returned
Browse TRAIL Inventories
(opens in new tab)
Search results
Roof-span studies in limestone
Method of determining the strength of a mine roof
Refine your search results
Published Year
1950-1959 (2)
Subject
Mine roof control (2) *
Limestone--Testing (1)
Author
Merrill, Robert H. (2) *
Morgan, Thomas A. (1)