Edited by Peter E. Glaser and Raymond F. Walker. edited by Dale S. Davis and Raymond A. Kulwiec. edited by Christos Capellos and Raymond F. Walker. edited by B. P. Straughan and S. Walker. edited by Gerald Popek and Bruce J. Walker. edited by G.G. Gibson and R. Walker. edited by Keith Watson and Raymond Wilson. edited by Peter Falster and R.B. Mazumder. edited by J. Rhodes and A.C. Walker. edited by Peter Rosset and John Vandermeer.