Menu Expand Menu Close
Back to Top
Filter Search Expand Close Filter
Search Expand Search Close

Search Constraints

Start Over
You searched for: Digital Content No Digital Content Remove constraint Digital Content: No Digital Content Subject Topical Iron mines and mining--Lake States--Safety measures. Remove constraint Subject Topical: Iron mines and mining--Lake States--Safety measures.
1 entry found
Number of results to display per page

Search Results

1. Electric blasting switches, underground mines, Lake Superior District.

Creator Personal:
Petersen, Max S., Cash, Frank E. (Frank Errette)
Title:
Electric blasting switches, underground mines, Lake Superior District.
Call Number:
P19460
Date:
1946
Description:

Serial issue. Issued as: United States. Bureau of Mines. Information circular, 7372 (1946:Sept.).

Subject Topical:
Ground control (Mining)--Lake States., Mine safety--Lake States., Iron mines and mining--Lake States--Safety measures.
All:
Ground control (Mining)--Lake States., Mine safety--Lake States., Iron mines and mining--Lake States--Safety measures.