Wightman, W., McCarry, D., Wightman, W. D., & McCarry, D. C. (1991). Proceedings: 1991 Rapid Excavation and Tunneling Confeence Seatle, Washington, June 16-20, 1991. Littleton, Colorado: SME.
Παραπομπή Chicago StyleWightman, W.D., D.C McCarry, W. D. Wightman, and D. C. McCarry. Proceedings: 1991 Rapid Excavation and Tunneling Confeence Seatle, Washington, June 16-20, 1991. Littleton, Colorado: SME, 1991.
Παραπομπή MLAWightman, W.D., D.C McCarry, W. D. Wightman, and D. C. McCarry. Proceedings: 1991 Rapid Excavation and Tunneling Confeence Seatle, Washington, June 16-20, 1991. Littleton, Colorado: SME, 1991.
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