by S. H. Steinberg ; with a foreword by Beatrice Warde. by Erwin Singer ; with a foreword by Esward S. Tauber. by M.G. Smith. ; with a foreword by Rex Nettleford. translated, with a foreword by Benedicta Ward. Luis A. Santalo ; with a foreword by Mark Kac. W.R. Smyser ; with a foreword by Paul Nitze. by Eustace C. Larke ; with a foreword by Maurice Cook. by W. L. Goodwin ; with a foreword by Gilbert A. Labine. H. Spencer ; with a foreword by Averill A. Liebow. J. S. Rogers ; with a foreword by T. H. Laby.