TY  - BOOK
AU  - Jurgensen Helmut
ED  - Conference on Semigroups( 1978 : Oberwolfach )
ED  - Conference on Semigroups
TI  - Semigroups: proceedings
SN  - 3-540-10701-0
U1  - 512.2 
PY  - 1981///
CY  - Berlin
PB  - Springer-Verlag
KW  - Semigroups
ER  -