Lane, K. S., & Garfield, L. A. (1972). Proceedings: North American rapid excavation and tunneling conference, Chicago, Illinois, June 5-7, 1972. New York, NY: American Institute of Mining, Metallurgical, and Petroleum Engineers.
Παραπομπή Chicago StyleLane, Kenneth S., and Larry A. Garfield. Proceedings: North American Rapid Excavation and Tunneling Conference, Chicago, Illinois, June 5-7, 1972. New York, NY: American Institute of Mining, Metallurgical, and Petroleum Engineers, 1972.
Παραπομπή MLALane, Kenneth S., and Larry A. Garfield. Proceedings: North American Rapid Excavation and Tunneling Conference, Chicago, Illinois, June 5-7, 1972. New York, NY: American Institute of Mining, Metallurgical, and Petroleum Engineers, 1972.
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