TY - JOUR TI - A Note on Endomorphism Semigroups JO - Canadian mathematical bulletin PY - 1970 SP - 526 EP - 526 VL - 13 IS - 4 UR - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1970-096-2/ DO - 10.4153/CMB-1970-096-2 ID - 10_4153_CMB_1970_096_2 ER -