E.]]M. Fortner]]Praeger,American Society of Mechanical Engineers.Fracture toughness of wrought and cast steels (1980 : Chicago)：the Winter Annual Meeting of the ASME, Chicago, Illinois, Nove. 16-21, 1980.ASEM,1980.
D. L. Babcock,American Society for Engineering Management.Engineering management through people(3rd : 1982 : Milwaukee, Wis.)：Proceedings of the 3rd annual meeting.ASEM,n. d..
