by Erwin Singer ; with a foreword by Esward S. Tauber. by Marion Milner ; with a foreword by Anna Freud. by S. H. Steinberg ; with a foreword by Beatrice Warde. by James W. Wilkie ; with a foreward by Howard F. Cline. Erwin Schrodinger ; with a foreword by Roger Penrose. J. S. Rogers ; with a foreword by T. H. Laby. by Shao-Tseng Wu ; with a foreword by Emory R. Johnson. by Ethel Browning ; with a foreword by W. V. Mayneord. by W. L. Goodwin ; with a foreword by Gilbert A. Labine. Koichi Tanaka ; with a foreword by Gerd Kaupp.