| LDR | 00496namk 00157 k 4500 | |
|---|---|---|
| 001 | 000000045909 | |
| 005 | 20081121133403 | |
| 008 | 081121s1991 us 000a eng | |
| 049 | ▼l WM00008269 | |
| 056 | ▼a 540.98 ▼2 Revised | |
| 090 | ▼a 540.98 ▼b O15u | |
| 110 | ▼a Occupational Safety and Health Administration. | |
| 245 | 10 | ▼a Underground Construction(Tunneling) : OSHA 3115 / ▼d Occupational Safety and Health Administration |
| 250 | ▼a Revised. | |
| 260 | ▼a United States: ▼b OSHA, ▼c 1991 | |
| 300 | ▼a 12p, ▼c 22cm |