edited by E. G. Derouane and A. A. Lucas. edited by E. L. Grove, A. J. Perkins. edited by B. Henderson and A. E. Hughes. edited by A. E. Dixon and J. D. Leslie. edited by E.R. Pike and L.A. Lugiato. edited by G. K. Horton and A. A. Maradudin. edited by E. J. Holborow and W. G. Reeves. edited by A. C. Knipe and W. E. Watts. edited by D. A. Brannan, J. G. Clunie. edited by D. G. Land and H. E. Nursten.