TY - JOUR AU - Alfred L. Foster TI - The identities of - and unique subdirect factorization within - classes of universal algebras. JO - Mathematische Zeitschrift PY - 1955 SP - 171 EP - 188 VL - 62 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZ_1955__62_169489/ ID - MZ_1955__62_169489 ER -