| 000 | 00496nam a22001337a 4500 | ||
|---|---|---|---|
| 008 | 230619b |||||||| |||| 00| 0 eng d | ||
| 040 |
_aNational Science Library _cNational Science Library |
||
| 080 |
_a622.33(082.2) _bL9 |
||
| 245 |
_aCoal conference & expo v _c/ Papers presented before the symposium on underground mining 23-25 October, 1979..............................Services |
||
| 260 |
_aNew York: _bMcGraw-Hill Inc, _c1979 |
||
| 300 | _a158p. | ||
| 650 | _aConference | ||
| 942 |
_2udc _cPR |
||
| 999 |
_c44707 _d44707 |
||