by K. R. Lewis and B. John. ed by R. W. Lewis and K. Morgan. by A. E. Vines and N. Rees. by I.A.D. Lewis and F.H. Wells. by J. R. D. Francis and P. Minton. by J. V. Dacie and S. M. Lewis. by C.J.O.R. Morris and P. Morris. edited by W. E. Lewis and S. Tandanand. edited by D.P.S. Verma and Th. Hohn.