| 000 | 00864n a2200253 4500 | ||
|---|---|---|---|
| 001 | 00946451 | ||
| 003 | PWmBRO | ||
| 005 | 20240602102347.0 | ||
| 008 | 911007s1975 dcua b f0 010 eng | ||
| 010 | _a91055184 | ||
| 090 |
_aVF _b622.0/6173/A652 |
||
| 245 | 0 | 0 |
_aApplication of large-hole burn cut in room-and-pillar mining / _cby R.L. Schnidt ...[et al.] |
| 260 | 0 |
_a[Washington] : _bU.S. Dept. of the Interior, Bureau of Mines, _c1975. |
|
| 300 | _a25 p. | ||
| 490 | 1 |
_aReport of investigations ; _v7994 |
|
| 650 | 0 | _aBlasting. | |
| 650 | 0 | _aMining engineering. | |
| 700 | 1 | 0 |
_aSchmidt, R. L. _q(Robert L.) |
| 710 | 2 | 0 |
_aUnited States. _bBureau of Mines. |
| 810 | 2 | 0 |
_aUnited States. _bBureau of Mines. _tReport of investigations ; _v7994 |
| 830 | 0 |
_aReport of investigations (United States. Bureau of Mines) ; _v7994 |
|
| 942 | _2ddc | ||
| 994 | 0 | 1 | _a082449 |
| 999 |
_c57949 _d57949 |
||