Author: | Gross, John, |
---|---|
Year: | 1921 |
Document Type: | MAIN |
SUDOC: | I 28.23:2264 |
Series: | Report of investigations / United States Department of the Interior, Bureau of Mines ; |
Report Number: | 2264 |
Subject: | Fluorspar |
Link: | https://hdl.handle.net/2027/mdp.39015095268986 |