Coal and metal and nonmetal entry level training student text material.
| Author/creator | United States |
| Format | Book |
| Publication Info | [Washington, D.C.?] : U.S. Dept. of Labor, Mine Safety and Health Administration, National Mine Health and Safety Academy, [2000] |
| Description | i, 50 p. : ill. ; 28 cm. |
| Subjects |
| Variant title | At head of title: 30 CFR part 50 |
| General note | Shipping list no.: 2001-0123-P. |
| General note | "CI 30a." |
| Technical rpt number | CI 30 a |
| GPO item number | 0637-K-02 |
| Govt. docs number | L 38.8:C 63/8/2000 |