ASTM, 1979. -- (ASTM special technical publication ; 678 . Proceedings of the Eleventh National Symposium on Fracture Mechanics : a symposium / sponsored by ASTM Committee E-24 on Fracture Testing of Metals [sic], American Society for Testing and Materials, Virginia Polytechnic Institute and State University, Blacksburg, Va., 12-14 June 1978 ; pt. 2).