Tunnel driving methods used at Ojuela unit of Compania Minera de Penoles, S. A., Ojuela, Durango, Mexico.
| Other author | Savage, John P. |
| Other author | Compañía Minera de Peñoles. |
| Format | Microform |
| Publication Info | Washington, D.C. : [publisher not identified], 1931. |
| Description | 8 pages : illustrations ; cm. |
| Subjects |
| Series | Mines Bur. Info. Circ. No. 6480 |
| General note | Reuse of record except for individual research requires license from LexisNexis Academic & Library Solutions. |
| General note | [With data on costs] |
| Citation/References note | CIS Index to U.S. Executive Branch Documents, 1910-1932 Part 2 |
| Reproduction note | Joyner- Microfiche. [Bethesda, Md.]: LexisNexis Academic & Library Solutions, 1997, 11 x 15 cm. (CIS US Executive Branch Documents : no. C22.11-6480) |
| Govt. docs number | C 22.11:6480 |
Availability
| Library | Location | Call Number | Status | Item Actions |
|---|---|---|---|---|
| Joyner | Microforms B300 | C22.11-6480 | ✔ Available |