%0 Journal Article %A Zassenhaus, Hans %T An Introduction to Diophantine Approximation by J. W. S. Cassels, Cambridge University Press 1957, I-X, p. 1166 (Cambridge Tracts No. 45, published by MacMillan. Canadian List Price $3.85). %J Canadian mathematical bulletin %D 1958 %P 57-57 %V 1 %N 1 %U http://geodesic.mathdoc.fr/articles/10.1017/S0008439500024693/ %R 10.1017/S0008439500024693 %F 10_1017_S0008439500024693