edit by J. R. Ewer and G. Latorre edit by M. H. Protter and C. B. Morrey edit by H. W. Fowler and F. G. Fowler edit by I. M. Singer and J. A. Thorpe edit by W. S. Fowler and J. Pidcock edit by W. S. Fowler and Norman Coe edit by D. H. Norrie and G. de Vries J. R. Ewer and G. Latorre edit by P. L. Sandler and C. L. Stott edit by C. M. Schwarz and M. A. Seaton