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2. Crystal Acoustics: Introduction to the Study of Elastic Waves and Vibrations in Crystals;Musgrave,1970
3. Ultrasonic Methods in Solid State Physics;Truell,1969
4. Elastic Constants and their Measurements;Schreiber,1973
5. Jr., Ultrasonic measurements in metallic beryllium at low temperatures;Overton;J. Chem. Phys.,1950