6 1 10 fourteenth symposium mixed material Los Angeles American society for testing and materials 1983 proceedings of the Thirteenth National Symposium on Fracture Mechanics : a symp mixed material Philadelphia American society for testing and materials 1981 a symposium presented at the seventy-eighth annual Meeti mixed material Philadelphia American society for testing and materials 1976 proceedings of the twelfth national symposium on fracture mechanics Paris, P.C. Additional Author mixed material Philadelphia ASTM 1979 proceedings of the eleventh national symposium on fracture mechanics : part 1 Smith, C.W. Additional Author mixed material Philadelphia ASTM 1979 Knott, J.F. Additional Author mixed material 0408707895 London Butterworth 1973