skip to content
Search
Search U.S. government technical reports digitized or harvested by
TRAIL
.
Keyword Search
Enter your search term(s):
[advanced search]
3 results returned
Browse TRAIL Inventories
(opens in new tab)
Search results
Permissible mine equipment approved during 1944
Permissible mine equipment approved to January 1, 1947 :with appended list of available flame-lamp fuels
Permissible mine equipment approved during the calendar year 1947 :supplement to Information Circular 7432
Refine your search results
Published Year
1940-1949 (3)
Subject
Coal mines and mining--Safety measures (3)
Mine safety (3) *
Mining machinery (3)
Author
Hooker, A. B. (3) *
