1. Clark, J.A., and Stone, K. L., “A Solid Plate Acoustical Viewer for Underwater Diving,” Acoustical Holography, Vol. 5, Plenum Press, 701–714 (1973).
2. IBID
3. Clark, J. A., Durelli, A. J., and Laura, P. A.,“On the Effect of Initial Stress on the Propagation of Flexural Waves in Elastic Rectangular Bars,” J.A.S.A. #4, 1077 - 1086 (1972)
4. See Reference 1.