Print version: British Conference on Non-Destructive Testing (28th : 1989 : Sheffield, England) Impact of non-destructive testing, NDT-89 : proceedings of the 28th Annual British Conference on Non-Destructive Testing, Sheffield, UK, 18-21, September 1989. First edition. Oxford, England ; Elmsford, New York : Pergamon Press, c1990 ix, 316 pages ISBN 9780080401911