by R. L. Mittal. With a foreword by S. R. Ranganathan. by B. J. Chalmers. With a foreword by T. H. Mason. by M.G. Gemmill; with a foreword by L. Rotherham. by I. G. Kesaev. With a foreword by Jerome Rothstein. by G. V. Samsonov. With a foreword by Henry H. Hausner. by C. D. Darlington ; with a foreword by Sir Daniel Hall. by A. Taylor ... with a foreword by Sir Lawrence Bragg. by Albert Q. Maisel; with a foreword by Ross T. McIntire .. by D. W. Brogan...with a foreword by Professor Harold J. Laski. Luis A. Santal鈕 ; with a foreword by Mark Kac.