%0 Journal Article %A Heinig, H. P. %T Systems of Singular Integral Equations, by N. P. Vekua. Translated by A. G. Gibbs and G. M. Simmons. P. Noordhoff, Groningen, 1967, 216 pages. %J Canadian mathematical bulletin %D 1969 %P 246-247 %V 12 %N 2 %U http://geodesic.mathdoc.fr/articles/10.1017/S0008439500030319/ %R 10.1017/S0008439500030319 %F 10_1017_S0008439500030319