1. Babikov, O. I., Ultrasonics and its industrial applications, Consultants Bureau (1960).
2. Banks, B., Oldfield, G. E. and Rawding, H., Ultrasonic flaw detection in metals, Illiffe, Prentice-Hall (1962).
3. Berger, H., Neutron radiography, Elsevier (1965).
4. Betz, C. E., Principles of magnetic particle testing, Magnaflux Corp. (1967).
5. Betz, C. E., Principles of penetrants, Magnaflux Corp. (1963).