Ultrasonic testing of materials /
Krautkrämer, Josef.
Krautkrämer, Herbert.
Zenzinger, B. W.
London Allen & Unwin
1969
Originally published as 'Werkstoffprüfung mit Ultraschall', 2. neubearb. Aufl. Berlin: Springer-Verlag, 1966
bibl p491-510
Ultrasonic testing.