Proceedings 1981 Rapid Excavation and Tunneling Conference, San Francisco, California, May 3-7, 1981
| Údair chorparáideacha: | , , |
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| Rannpháirtithe: | , |
| Formáid: | LEABHAR |
| Teanga: | English |
| Foilsithe / Cruthaithe: |
New York, N.Y.
Society of Mining Engineers of AIME
1981.
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| Ábhair: |


