%0 Journal Article %A B. Eckman %A Peter Hilton %T Structure maps in group theory %J Fundamenta Mathematicae %D 1961 %P 207-221 %V 50 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-50-2-207-221/ %R 10.4064/fm-50-2-207-221 %G en %F 10_4064_fm_50_2_207_221