1. Feinstein, L., and Hruby, R.J., “Surface Crack Detection by Microwave Methods,” presented at the Sixth Symposium on Nondestruction Evaluation of Aerospace and Weapons Systems Components and Materials, San Antonio, Tex. (April 17–19, 1967).
2. Klima, S.J., Lesco, D.J., andFreche, J.C., “Application of Ultrasonics to Detection of Fatigue Cracks,”Experimental Mechanics,6, (3),154–161 (1966).
3. Rasmussen, J.G., “Prediction of Fatigue Failure Using Ultrasonic Surface Waves,”Jnl. Soc. for Nondestructive Testing,20, (2),103–110 (1962).
4. Rublev, Ya.A., andDanilov, S.Yu., “Ultrasonic Detection of Fatigue Cracks During Repeated Static Tests,”Industrial Laboratory,29,1306–1309 (April1964).
5. Hinsley, J.F., Non-Destructive Testing, MacDonald and Evans Ltd., London (1959).