Max S. Shapiro, executive editor ; contributors, William K. Benton ... [et al.]. William H. Overholt, editor ; contributors, Lewis A. Dunn ... [et al.]. Michael Curtis, general editor ; contributors, Jean Blondel ... [et al.]. Tyler G. Hicks, editor ; contributors, Gerald M. Eisenberg ... [et al.]. [editor, Richard E. Fitts ; contributors, Robert W. Burton ... [et al.]. Alan S. Foss and Morton M. Denn, editors ; [contributors] O. A. Asbjornsen ... [et al.].