International Conference on Pipelines and Trenchless Technology Shanghai, China, ebrary, Inc, Najafi, M., & Ma, B. (2009). Advances and experiences with pipelines and trenchless technology for water, sewer, gas, and oil applications: Proceedings of the International Conference on Pipelines and Trenchless Technology 2009, October 18-21, 2009, Shanghai, China. American Society of Civil Engineers.

International Conference on Pipelines and Trenchless Technology Shanghai, China, Inc ebrary, Mohammad Najafi, và Baosong Ma. Advances and Experiences with Pipelines and Trenchless Technology for Water, Sewer, Gas, and Oil Applications: Proceedings of the International Conference on Pipelines and Trenchless Technology 2009, October 18-21, 2009, Shanghai, China. Reston, Va.: American Society of Civil Engineers, 2009.

International Conference on Pipelines and Trenchless Technology Shanghai, China, et al. Advances and Experiences with Pipelines and Trenchless Technology for Water, Sewer, Gas, and Oil Applications: Proceedings of the International Conference on Pipelines and Trenchless Technology 2009, October 18-21, 2009, Shanghai, China. American Society of Civil Engineers, 2009.