With a foreword by Gordon Radley. With a foreword by Lord Todd. with a foreword by A. D. Baxter. With a foreword by Sir Harold Hartley. With a foreword by Edwin Gregory. With a foreword by H. E. Taylor. With a foreword by H. M. Barlow. With a foreword by Sir John Hacking. with a foreword by Peter Debye. With a foreword by John E. Harris.