D. Beecham

Ultrasonic transducers for frequencies above 50MHz

D. Beecham, 1967 .

Ultrasonic scatter in metals its properties and its application to grain size determination

D. Beecham, D. Beecham, 1966 .

Sputter Machining of Piezoelectric Transducers

D. Beecham, 1969 .