| Author: | Bensema, W. D. | 
|---|---|
| Additional Authors: | Adams, John W.,, Kanda, Motohisa, | 
| Year: | 1974 | 
| Document Type: | NBSA | 
| Issuing Agency: | Electromagnetics Division, Institute for Basic Standards, National Bureau of Standards, | 
| SUDOC: | C 13.46:654 | 
| Series: | U.S. Bureau of Standards NBS technical note ; | 
| Report Number: | 654 | 
| Subjects: | Mine safety | 
| Mine communication systems | |
| Links: | https://hdl.handle.net/2027/uiug.30112105086562 | 
| https://hdl.handle.net/2027/mdp.39015095042969 |