Automatic derailing switch at Roslyn No. 3 mine, Northwestern Improvement Company, Roslyn, Wash [microform]
Saved in:
| Corporate Author: | |
|---|---|
| Other Authors: | , |
| Format: | Government Document Microfilm Book |
| Language: | English |
| Published: |
Washington, D.C. :
[publisher not identified],
1930.
|
| Series: | Information circular (United States. Bureau of Mines) ;
6226. |
| Subjects: |
Norlin Library - Government Information - Microform
| Call Number: |
EBD C22.11-6226
|
|---|---|
| EBD C22.11-6226 | Restricted Place a Hold |