by A. R. Bailey and L. E. Samuels. by C. L. Dailey and F. C. Wood. by G. S. Hartley and T. F. West. by A. S. Hornby and E. C. Parnwell. by B. I. Bleaney and B. Bleaney. by H. Ibach and D.L. Mills. by J. A. Radley and Julius Grant. ed. by A. r. Katritzky and A. J. Boulton.