Tunnel and Shaft Conference, Minneapolis, American Society of Civil Engineers, Society of Mining Engineers of AIME, University of Minnesota. School of Mineral and Metallurgical Engineering, Minnesota. University. Dept. of Civil Engineering, & Yardley, D. H. (1970). Rapid excavation--problems and progress: Proceedings. Society of Mining Engineers of the American Institute of Mining, Metallurgical, and Petroleum Engineers.
Παραπομπή σε μορφή Chicago (17η εκδ.)Tunnel and Shaft Conference, Minneapolis, American Society of Civil Engineers, Society of Mining Engineers of AIME, University of Minnesota. School of Mineral and Metallurgical Engineering, Minnesota. University. Dept. of Civil Engineering, και Donald H. Yardley. Rapid Excavation--problems and Progress: Proceedings. New York: Society of Mining Engineers of the American Institute of Mining, Metallurgical, and Petroleum Engineers, 1970.
Παραπομπή σε μορφή MLA (8th εκδ.)Tunnel and Shaft Conference, Minneapolis, et al. Rapid Excavation--problems and Progress: Proceedings. Society of Mining Engineers of the American Institute of Mining, Metallurgical, and Petroleum Engineers, 1970.