%0 Journal Article %A Helfenstein, Heinz G. %T Riemann Surfaces, by Lars V. Ahlfors and Leo Sario. Princeton Mathematics Series 26, Princeton University Press, 1960, xi + 382 pages. %J Canadian mathematical bulletin %D 1961 %P 195-196 %V 4 %N 2 %U http://geodesic.mathdoc.fr/articles/10.1017/S0008439500025777/ %R 10.1017/S0008439500025777 %F 10_1017_S0008439500025777