Jacobs, J. M., & Hendricks, R. S. (1987). Rapid excavation and tunneling: 8th Conference, New Orleans, Luisiana, June 14-17, 1987 : proceedings. Littleton, CO.: Society of Mining Engineers, Inc..
Παραπομπή Chicago StyleJacobs, John M., and Robert S. Hendricks. Rapid Excavation and Tunneling: 8th Conference, New Orleans, Luisiana, June 14-17, 1987 : Proceedings. Littleton, CO.: Society of Mining Engineers, Inc., 1987.
Παραπομπή MLAJacobs, John M., and Robert S. Hendricks. Rapid Excavation and Tunneling: 8th Conference, New Orleans, Luisiana, June 14-17, 1987 : Proceedings. Littleton, CO.: Society of Mining Engineers, Inc., 1987.
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