TY - JOUR AU - M.A. Taylor TI - R-and T-Groupoids: A Generalization of Groups. (Short Communication). JO - Aequationes mathematicae PY - 1974 SP - 318 EP - 319 VL - 11 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/AM2_1974__11_136473/ ID - AM2_1974__11_136473 ER -