TY - JOUR AU - David M. Clark TI - Varieties with isomorphic free algebras JO - Colloquium Mathematicum PY - 1969 SP - 181 EP - 187 VL - 20 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/cm-20-2-181-187/ DO - 10.4064/cm-20-2-181-187 LA - en ID - 10_4064_cm_20_2_181_187 ER -