Author: | Read, T. T. |
---|---|
Year: | 1920 |
Document Type: | N/A |
Series: | United States Bureau of Mines Reports |
Report Number: | Circular No. 2115 |
Subjects: | Miners -- Education -- United States. |
Mineral engineering -- Vocational guidance. | |
Link: | http://digital.library.unt.edu/ark:/67531/metadc100845/ |