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 All Subjects Signals and signaling. Remove constraint All Subjects: Signals and signaling.
1 entry found
Number of results to display per page

Search Results

1. Some signaling systems in metal-mine shafts.

Creator Personal:
Mosier, McHenry., Gleim, E. J. (Ernest J.)
Title:
Some signaling systems in metal-mine shafts.
Call Number:
P19470
Date:
1939
Description:

Serial issue. Issued as: United States. Bureau of Mines. Information circular, 7083 (1939:June).

Subject Topical:
Signals and signaling., Mine safety., Mine communication systems.
All:
Signals and signaling., Mine safety., Mine communication systems.