editors and convenors Michael J. Rymer, William J. Ellsworth, compiled by Muriel Jacobson ; convened under auspies of national earthquake prediction and hazards programs
sponsored by U.S. Geological Survey, Earthquake Hazards Reduction Program ; editors and convenors, James C. Yount and Robert S. Crosson ; compiled by Muriel Jacobson
sponsored by U.S. Geological Survey, Volcano Hazards Program ; editors and convenors David P. Hill, Roy A. Bailey, Allan S. Ryall ; compiled by Muriel Jacobson