[by] Phillip Cutler with the assistance of Hardy Hoover. by Irwin Unger. With the assistance of Debi Unger. by John M. Cage, with the assistance of C. J. Bashe. by Mary K. Biagini with the assistance of Judith Hartzler. Irwin Unger ; with the assistance of Debi Unger. David Mumford with the assistance of C. Musili. William I. Salmon with the assistance of Edward L. Salmon. by George H. McKnight; with the assistance of Bert Emsley. Randall E. Decker, with the assistance of Robert A. Schwegler. editor, R. Briggs with the assistance of G.A. Book