J. S. Rogers ; with a foreword by T. H. Laby. R. W. G. Hunt ; with a foreword by W. D. Wright. H. Spencer ; with a foreword by Averill A. Liebow. V.I. Sreenivas ; with a foreword by C.E. Welch. by R. Doswell ; with a foreword by John Beavis. R. A. B. Rorie ; with a foreword by G. F. Abercrombie. by W. L. Goodwin ; with a foreword by Gilbert A. Labine. Roger Gabriel ; with a foreword by M. D. Milne. by Erwin Singer ; with a foreword by Esward S. Tauber. W.R. Smyser ; with a foreword by Paul Nitze.