TY - JOUR AU - Heinig, H. P. TI - Systems of Singular Integral Equations, by N. P. Vekua. Translated by A. G. Gibbs and G. M. Simmons. P. Noordhoff, Groningen, 1967, 216 pages. JO - Canadian mathematical bulletin PY - 1969 SP - 246 EP - 247 VL - 12 IS - 2 UR - http://geodesic.mathdoc.fr/articles/10.1017/S0008439500030319/ DO - 10.1017/S0008439500030319 ID - 10_1017_S0008439500030319 ER -