H. Spencer ; with a foreword by Averill A. Liebow. J. S. Rogers ; with a foreword by T. H. Laby. W.R. Smyser ; with a foreword by Paul Nitze. W.A. Ritschel ; with a foreword by David J. Greenblatt. by S. H. Steinberg ; with a foreword by Beatrice Warde. by Erwin Singer ; with a foreword by Esward S. Tauber. John Colling ; with a foreword by Harrison E. Salisbury. by Shao-Tseng Wu ; with a foreword by Emory R. Johnson. edited by Leon Schiff ; with a foreword by Cecil J. Watson. by W. L. Goodwin ; with a foreword by Gilbert A. Labine.