%0 Journal Article %A Baker, Catharine %T Moulton Affine Hjelmslev Planes %J Canadian mathematical bulletin %D 1978 %P 135-142 %V 21 %N 2 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1978-024-7/ %R 10.4153/CMB-1978-024-7 %F 10_4153_CMB_1978_024_7