TY - JOUR TI - GMJ volume 31 issue 1 Cover and Back matter JO - Glasgow mathematical journal PY - 1989 SP - b1 EP - b1 VL - 31 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.1017/S0017089500007497/ DO - 10.1017/S0017089500007497 ID - 10_1017_S0017089500007497 ER -