Malaria, a World Problem: By E. J. Pampana, M.D., Chief, Malaria Section, WHO; and P. F. Russell, M.D., M.P.H., Division of Medicine and Public Health, Rockefeller Foundation, New York, N. Y., WHO Malaria Consultant. Geneva: WHO, 72 pp. illus. 1955, 3/6, $0.70, Sw. fr. 2, (paper)