Foreword by James D. Hart. Foreword by Jack A. Morton. With a foreword by James J. Waring. Foreword by Hans A. Bethe. Foreword by John G. Adams. Foreword by Mario Salvadori. With a foreword by James R. Newman. With a foreword by Charles T. Myers. With a foreword by Walter C. Alvarez. Foreword by G. V. Raynor.