%0 Journal Article %T Transactions of the fourth Prague conference on information theory, statistical decision functions, random processes. Academic Press, New York and London, 1967, 725 pages. %J Canadian mathematical bulletin %D 1968 %P 517-517 %V 11 %N 3 %U http://geodesic.mathdoc.fr/articles/10.1017/S0008439500029775/ %R 10.1017/S0008439500029775 %F 10_1017_S0008439500029775