%0 Journal Article %A Don Pigozzi %T The join of equational theories %J Colloquium Mathematicum %D 1974 %P 15-25 %V 30 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-30-1-15-25/ %R 10.4064/cm-30-1-15-25 %G en %F 10_4064_cm_30_1_15_25