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2. B. Jaffe, W. R. Cook and H. Jaffe, “Piezoelectric Ceramics,” Academic Press, New York,(1971).
3. DOD-STD-1376A, “Piezoelectric Ceramic Materials and Measurement Guidelines for Sonar Transducers,”(1985).
4. “IEEE Standard on Piezoelectricity,” (IEEE Standard 176),(1978).
5. “Modern Piezoelectric Ceramics,” Vernitron Piezoelectric Division technical data brochure PD 9247,(1988).