Edited by H.R.v. Gaertner and H. Wehner. edited by H. Eggerer and R. Huber. edited by J. Nowotny and W. Weppner. edited by S.M. Perren and E. Schneider. edited by A.G. Milnes and C.J. Miner. edited by G.G. Gibson and R. Walker. edited by H. Martin and F.W. Eder. edited by I.M. MacLeod and A.D. Heher. edited by A. S. Strub and H. Ehringer. edited by G. Cochard and P. Kessler.