J. Hindley ; with a contribution by R. Staden. J. Drozd with a contribution by J. Nov鈇k. Mark C. Gridley ; with contributions by David Cutler. D. Zissos, with contributions by J. C. Bathory. Paul L. Nunez ; with contributions by Ron D. Katznelson. Frank K. Reilly ; with contributions by Don M. Chance. G.V. Reklaitis ; with contributions by Daniel R. Schneider. Robert E. Hodges, with contributions by Raymond D. Adelman. Bernard W. Pipkin, with contributions by D.D. Trent. Edward M. Mikhail, with contributions by F. Ackermann.