Author: | Bowles, Oliver, |
---|---|
Year: | 1929 |
Document Type: | BMRA |
Issuing Agency: | U.S. Dept. of Commerce, Bureau of Mines, |
SUDOC: | C 22.12:2971 |
Series: | Report of investigations / United States Department of Commerce, Bureau of Mines ; |
Report Number: | 2971 |
Subject: | Slate |
Link: | https://hdl.handle.net/2027/mdp.39015077566415 |