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
Support of ground, iron-ore mines, Lake Superior district
Refine your search results
Published Year
1940-1949 (1)
Subject
Ground control (Mining)--Lake States (1)
Iron mines and mining--Lake States (1) *
Author
Cash, Frank E. (1)
Petersen, Max S. (1) *
