1. J.H. Rose and J.A. Krumhansl, J. Appl. Phys. 50, 2951 (1979).
2. J. H. Rose and J. M. Richardson, J. Nondestructive Evaluation
(in press).
3. V.G. Kogan and J.H. Rose, these proceedings.
4. D. K. Hsu, J. H. Rose, and D. O. Thompson, these proceedings.
5. D.K. Hsu, J.H. Rose, R.B. Thompson, and D.O. Thompson, submitted to Appl. Phys. Letts.