TY - JOUR AU - K.D. Jr. Magill AU - S. Subbiah TI - The partially ordered collection of regular ...-classes of S(X). (Short Communication). JO - Aequationes mathematicae PY - 1976 SP - 509 EP - 509 VL - 14 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/AM2_1976__14_136617/ ID - AM2_1976__14_136617 ER -