TY  - BOOK
AU  - Grillet P A
TI  - Commutative semigroups
SN  - 0-7923-7067-8
U1  - 512.2 
PY  - 2001///
CY  - Dordrecht
PB  - Kluwer Academic
KW  - Commutative semigroups
ER  -