Authors: Infield, H. F. --- Parry, H. B. --- Trowell, H. C. --- Berry, W. T. S. --- Jennings, L. --- et al. Norman, H. F. --- Knapp, J. G. --- Hull, J. T. --- Ryan, J. C. --- Horrocks, M. J. --- Cheesman, W. J. W. --- Boyd, R. --- Brown, J. W. --- Henry, R. --- Barfield, A. R. --- Hemmer, C. --- Brugger, H. --- Stensgard, H. H. --- Bjanes, T. --- Evelpidis, Chrysos --- Amer, A. L. --- Touny, A. D. --- Plunkett foundation for co-operative studies
Year: 1948 Publisher: Cambridge : W. Heffer & Sons,