Use of type N miners' gas mask.
| Other author | Katz, S. H. (Sidney Hershberg), 1884- |
| Other author | McCaa, George S., 1884- |
| Format | Microform |
| Publication Info | [Washington?] : U.S. G.P.O., 1929. |
| Description | ii, 29 pages ; cm. |
| Subjects |
| Series | Miners' Circ. No. 32 |
| General note | Reuse of record except for individual research requires license from LexisNexis Academic & Library Solutions. |
| 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. C22.6-32) |
| Govt. docs number | C 22.6:32 |