TY - JOUR AU - T.E. Hall TI - Inverse semigroup varieties with the amalgamation property. JO - Semigroup forum PY - 1978 SP - 37 EP - 52 VL - 16 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SF_1978__16_134272/ ID - SF_1978__16_134272 ER -