TY  - BOOK
AU  - Lallement Gerard
TI  - Semigroups and combinatorial applications
T2  - Pure and applied mathematics: a series of monographs and textbook
U1  - B27, L9;1 
PY  - 1979///
CY  - New York    
PB  -  John Wiley       
KW  -  Machine theory
KW  - Semigroups
ER  -