9Edward D Billington, Dennis A Sack, Larry D Olson. Sonic pulse velocity testing to assess condition of a concrete dam[ C ]//Symposi- um on the Application of Geophysics to Engineering and Environmen- tal Problems. 2001, 14(1 ). 被引量：1
10Leslie J R, W J Cheeseman. An ultrasonic method for studying de- terioration and cracking in concrete structures [ C ]//Amer Concrete Inst Proceedings. 1949, 46(1) : 17-36. 被引量：1
