%0 Journal Article
%A Alexander, J. C.
%T Introduction to Spectral Theory in Hilbert Space, by G. M. Helmberg. iii + 346 pages. Series in Applied Mathematics and Mechanics, North-Holland, Amsterdam, 6, 1969. U.S. $19.50.
%J Canadian mathematical bulletin
%D 1972
%P 461-462
%V 15
%N 3
%U http://geodesic.mathdoc.fr/articles/10.1017/S0008439500031477/
%R 10.1017/S0008439500031477
%F 10_1017_S0008439500031477