TY  - BOOK
AU  - Clifford,A.H.
AU  - Preston,G.B.
TI  - The algebraic theory of semigroups
T2  - Mathematical surveys
AV  - QA171 .C55
U1  - 512.86 
PY  - 1961///-
CY  - Providence
PB  - American Mathematical Society
KW  - Semigroups
KW  - Local
N1  - 920327; Includes bibliographies
ER  -