Edited by Robert C. Thomas and Ellen T. Crowley. edited by Dagobert D. Runes and Harry G. Schrickel. edited by Robert D. Allen and Thomas E. Wolfe. edited by Robert S. Anderssen and Frank R. de Hoog. edited by Fred H. Colvin and Frank A. Stanley. edited by Robert Bennett and Robert Estall. edited by Robert P. Becker and Om Johari. edited by Robert W. Parry and Goji Kodama. edited by Bill Katz and Ruth A. Fraley. edited by Elliot R. Robertson and James M. Harvey.