Earthquake Disaster Mitigation Act of 1975 : hearing before the Subcommittee on Oceans and Atmosphere of the Committee on Commerce, United States Senate, Ninety-fourth Congress, second session on S. 1174, to provide sound physical bases and operational systems for achieving major reductions in the earthquake hazards faced by the population living in regions of the United States of significant seismic risk and to amend the National Science Foundation Act of 1950 so as to provide for a research program relating to earthquake mitigation, and for other purposes, February 19, 1976