TY - JOUR TI - Abstracts of Theses JO - Canadian mathematical bulletin PY - 1968 SP - 520 EP - 524 VL - 11 IS - 3 UR - http://geodesic.mathdoc.fr/articles/10.1017/S0008439500029817/ DO - 10.1017/S0008439500029817 ID - 10_1017_S0008439500029817 ER -