TY  - BOOK
AU  - Howie,John M.
TI  - An introduction to semigroup theory
SN  - 0123569508 :
U1  - 512.86 
PY  - 1976///
CY  - London
PB  - Academic Press
KW  - Semigroups
N1  - Includes index; Bibliography: p. 257-264
ER  -