@book{19671, author = {Berger, H. and Symposium on nondestructive testing standards-a review and Berger, Harold}, title = {Nondestructive testing standards-a review}, publisher = {American Society for Testing & Materials}, year = {1977}, address = {West Conshohocken }, url = {http://www.columbia.edu/cgi-bin/cul/resolve?clio8574588} }