TY  - BOOK
AU  - Pollak G. Ed.
ED  - Conference on algebraic theory of semigroups (1976 : Szeged)
TI  - Proceeding on Algebraic theory of semigroups
T2  - Colloquia mathematics societies janos bolyai; 20
U1  - B27p1,N76, L6 
PY  - 1976///
CY  - Amsterdam
PB  - North-Holland         
ER  -