%0 Journal Article %A John Baldwin %T Atomic compactness in $ℵ_1$ - categorical Horn theories %J Fundamenta Mathematicae %D 1973 %P 263-268 %V 83 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-83-3-263-268/ %R 10.4064/fm-83-3-263-268 %G en %F 10_4064_fm_83_3_263_268