edited by S.W. Hawking, W. Israel. edited by S. W. Hawking, W. Israel. edited by C. L. Tang, L. Marton. edited by R.B. King, J.P. Oliver. edited by L. Sandy Maisel. edited by V. Dlab and P. Gabriel. edited by D.L. Hawksworth. edited by Erwin O. Smigel. edited by H.C. Gooi and H. Chapel. edited by J. V. Dawkins.