Efficiency of grinding mills.
| Format | Microform |
| Publication Info | Washington, D.C. : [publisher not identified], 1929. |
| Description | 23 pages : illustrations ; cm. |
| Subjects |
| Other author/creator | Gross, John, 1922-2015 |
| Other author/creator | Zimmerley, Stuart R. |
| Other author/creator | International Smelting Co. |
| Other author/creator | U.S. Smelting, Refining & Mining Co. |
| Series | Mines Bur. Rpt. of Investigation No. 2952 |
| General note | Reuse of record except for individual research requires license from LexisNexis Academic & Library Solutions. |
| General note | [On tests at U.S. Smelting, Refining and Mining Co. and International Smelting Co.; with data on several minerals] |
| 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. C22.12-2952) |
| Govt. docs number | C 22.12:2952 |