TY - JOUR TI - Abstracts of Theses JO - Canadian mathematical bulletin PY - 1964 SP - 507 EP - 510 VL - 7 IS - 3 UR - http://geodesic.mathdoc.fr/articles/10.1017/S0008439500032148/ DO - 10.1017/S0008439500032148 ID - 10_1017_S0008439500032148 ER -