Bernard J. Nebel ; with editorial assistance by Edward J. Kormondy. Rowland T. Moriarty ; with editorial assistance by Mel Patrell Furman. Amy L. Sonka ; with editorial assistance by Elizabeth Whalley. William I. Salmon with the assistance of Edward L. Salmon. by Ronald E. Scott ; with the editorial assistance of Martin W. Essigmann. David Azbel ; with editorial assistance by Philip Kemp-Pritchard.