534
R522T
           Richardson, E G (Ed.)
               Technical aspects of sound \ E G Richardson - Amsterdam : Elsevier Publishing Company, 1953.
               2v. (xviii, 544p; xii, 412p)
                Contents: v.1. Sonic range and airborne sound -v.2. Ultrasonic range, under water acoustics

23948
                Subjects: Sound; Ultasonic transducers; Electric apparatus and appliances.