TY - JOUR AU - P. Olin TI - Varietal free products of bands. JO - Semigroup forum PY - 1980 SP - 83 EP - 88 VL - 21 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SF_1980__21_134436/ ID - SF_1980__21_134436 ER -