The Symposium on Fatigue Crack Growth Under Spectrum Loads was held on 23–24 June 1975 at the Seventy-eighth Annual Meeting of the American Society for Testing and Materials in Montreal, Quebec, Canada. Committee E-24 on Fracture Testing of Metals and Committee E-9 on Fatigue sponsored the symposium. R. P. Wei, Lehigh University, and R. I. Stephens, The University of Iowa, served as the symposium cochairmen. Serving as members of the Symposium Organizing/Program Committee and as session chairmen were J. M. Barsom, U. S. Steel Corp.; W. G. Clark, Jr., Westinghouse R & D Center; N. E. Dowling, Westinghouse R & D Center; C. M. Hudson, NASA Langley Research Center; E. K. Walker, Lockheed California Co.; and Howard Wood, AFFDL/FBR, Wright-Patterson AFB.