Bowerman, L. D., Monsees, J. E., Wightman, W., Mc Carry, D., Bowerman, L. D., & Monsees, J. E. (1993). Proceedings: 1993 rapid excavation and tunneling conference. Littleton, Colorado: SME.
Παραπομπή Chicago StyleBowerman, L. D., J. E. Monsees, W.D Wightman, D.C Mc Carry, L. D. Bowerman, and J. E. Monsees. Proceedings: 1993 Rapid Excavation and Tunneling Conference. Littleton, Colorado: SME, 1993.
Παραπομπή MLABowerman, L. D., et al. Proceedings: 1993 Rapid Excavation and Tunneling Conference. Littleton, Colorado: SME, 1993.
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