With a foreword by E. J. Vaughan. With a foreword by E. D. Hughes. With a foreword by F. A. Jackman. with a foreword by A. D. Baxter. With a foreword by L. E. Sutton. With a foreword by H. E. Taylor. With a foreword by H. M. Barlow. With a foreword by H. R. Ing. With a foreword by I. I. Rabi. With a foreword by R. H. Evans.