Applicability of Radio to Emergency Mine Communications: Progress Report, September 1946 to November 1947
Description: Report issued by the Bureau of Mines over the progress made in emergency mine communications. The results of testing done on low-frequency radio communication are presented. This report includes tables, graphs, illustrations, and photographs.
Date: May 1948
Creator: Felegy, E. W. & Coggeshall, E. J.
Item Type: Report