With foreword by Lee Ling. with a foreword by Peter Debye. With a foreword by H. R. Ing. With a foreword by James J. Waring. With a foreword by Lord Todd. With a foreword by R. H. Evans. With a foreword by H. Berry. With a foreword by I. I. Rabi. with a foreword by A. D. Baxter. With a foreword by Charles C. Fries.