Author: | Brichta, Louis Chanborn |
---|---|
Year: | 1960 |
Document Type: | N/A |
SUDOC: | I 28.27:7993 |
Series: | Information circular (United States. Bureau of Mines) |
Report Number: | I. C. 7993 |
Subjects: | Borings -- United States. |
Lead mines and mining -- United States. | |
Zinc mines and mining -- United States. | |
Link: | http://digital.library.unt.edu/ark:/67531/metadc170724/ |