1. Fertig, K. W. and J. M. Richardson, “Inverse Scattering at Low and Intermediate Frequencies,” “Proceedings of the ARPA/AFML of Progress in Quantitative NDE”, July, 8–13, (1979).
2. Achenbach, J. D., “Direct and Inverse Methods for Scattering by Cracks at High Frequencies,” Proceedings of the ARPA/AFML Review of Progress in Quantitative NDE, July, 8–13, (1979).
3. J. H. Rose and J. A. Krumhansl, J. Appl. Phys.50 2951 (1979).
4. J. M. Richardson and R. K. Elsley, “Extraction of Low-Frequency Properties from Scattering Measurements,” Ultrasonics Symposium Proceedings, Sept. 1979, p. 336–341.
5. J. M. Richardson, “Scattering of Elastic Waves from Symmetric Inhomogeneities at low Frequencies,” to be published.