| 000 | 00781nam a2200217Ia 4500 | ||
|---|---|---|---|
| 008 | 170503s9999||||xx |||||||||||||| ||und|| | ||
| 080 | _a55(788) | ||
| 100 | 1 | _aWAHLSTROM, Ernest E. | |
| 245 | 0 |
_aHistory of geologic investigations, engineering design, and construction methods of the Harold D. Roberts Tunnel, Colorado / _cby Ernest E. Wahlstrom. |
|
| 260 |
_aWashington : _bUnited States Government Printing Office, _c1974 |
||
| 300 | _a13 p. + map. -- | ||
| 336 |
_2isbdcontent _aTexto (visual) |
||
| 337 |
_2isbdmedia _3Impreso _asin mediación |
||
| 490 | _aGeological Survey Professional Paper | ||
| 490 | _v 831-A | ||
| 650 | _aColorado | ||
| 650 | _aGeología | ||
| 942 | _2cdu | ||
| 942 | _cBK | ||
| 999 |
_c20596 _d20596 |
||