Proceedings 1991 Rapid Excavation and Tunneling Conference, Seattle, Washington, June 16-20, 1991
| निगमित लेखक: | |
|---|---|
| स्वरूप: | पुस्तक |
| भाषा: | English |
| प्रकाशित: |
Littleton, Colorado
Society for Mining Metallurgy, and Exploration, Inc.
c1991.
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| विषय: |