2nd edition, by Wilfrid J. Dixon, Professor of Biostatistics, and Frank J. Massey, Associate Professor of Biostatistics; University of California, Los Angeles. New York, Toronto and London: McGraw-Hill, 1957. Pp. xiii, 488. $6.00
(London School of Hygiene and Tropical Medicine Memoir 12), by R. S. Bray, B.Sc., Ph.D., 1st edition, 192 pages, illustrated. London, H. K. Lewis & Co., Ltd., 1957, £2.2s. net
by George Maedonald, C.M.G., M.D., F.R.C.P., Director of the Ross Institute of Tropical Hygiene; Professor of Tropical Hygiene, London School of Hygiene and Tropical Medicine. 201 + liv pp., illustrated with figures and tables. London, New York and Toronto, Oxford University Press, 1957. Price, $7.50 in U.S.A
