%0 Journal Article
%A R. Solomon
%T A type of βN with $ℵ_0$ relative types
%J Fundamenta Mathematicae
%D 1973
%P 209-212
%V 79
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/fm-79-3-209-212/
%R 10.4064/fm-79-3-209-212
%G en
%F 10_4064_fm_79_3_209_212