1. A. Vary,Nondestructive Evaluation Technique Guide (NASA SP-3079, 1973).
2. A. Vary and K. J. Bowles,Use of an Ultrasonic Accousting Technique for Nondestructive Evaluation of Fiber Composite Strength (NASA Technical Memorandum TM-73813, February 1978).
3. A. Vary and R. L. Lark,Correlation of Fiber Composite Tensile Strength with the Ultrasonic Stress Wave Factor (NASA Technical Memorandum TM-77846, April 1978).
4. A. Vary and K. J. Bowles,Ultrasonic Evaluation of the Strength of Unidirectional Graphite-Polymide Composites (NASA Technical Memorandum TM X-73646, April 1977).
5. A. Vary,Quantitative Ultrasonic Evaluation of Mechanical Properties of Engineering Materials (NASA Technical Memorandum TM-78905, June 1978).