%0 Journal Article %T GMJ volume 21 issue 2 Cover and Back matter %J Glasgow mathematical journal %D 1980 %P b1-b1 %V 21 %N 2 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089500004225/ %R 10.1017/S0017089500004225 %F 10_1017_S0017089500004225