| LDR | 00524camk 00145 k 4500 | |
|---|---|---|
| 001 | 000000026870 | |
| 005 | 19971118133403 | |
| 008 | 971118s1997 us 000a eng | |
| 049 | ▼l WM00004241 | |
| 056 | ▼a 530.983 | |
| 090 | ▼a 530.983 ▼b N277s | |
| 110 | ▼a National Institute for Occupational Safety and Health. | |
| 245 | 10 | ▼a Standard Application Procedures for the Certification of Respirators(July 1997) / ▼d National Institute for Occupational Safety and Health |
| 260 | ▼a United States: ▼b NIOSH , ▼c 1997 | |
| 300 | ▼a 면수 복잡 , ▼c 29cm |