Symposium on Rapid Excavation Sacramento, Calif, Sacramento State College. School of Engineering, & Hartman, H. L. (1969). Progress toward goals: Proceedings of the II symposium on rapid excavations, October 16-17, 1969. Sacramento State College.
芝加哥风格引文Symposium on Rapid Excavation Sacramento, Calif, Sacramento State College. School of Engineering, 与 Howard L. Hartman. Progress Toward Goals: Proceedings of the II Symposium on Rapid Excavations, October 16-17, 1969. Sacramento: Sacramento State College, 1969.
MLA引文Symposium on Rapid Excavation Sacramento, Calif, et al. Progress Toward Goals: Proceedings of the II Symposium on Rapid Excavations, October 16-17, 1969. Sacramento State College, 1969.
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