TY - JOUR AU - Leavitt, W. G. TI - Hereditary semisimple classes JO - Glasgow mathematical journal PY - 1970 SP - 7 EP - 8 VL - 11 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.1017/S0017089500000781/ DO - 10.1017/S0017089500000781 ID - 10_1017_S0017089500000781 ER -