000
00268nam a2200109 4500
008
160616s 000 0
245
_a
The algebraic theory of semigroups
100
_a
Clifford, A
100
_a
Preston, G.B
942
_c
BK
_2
BK11425
080
_a
512.542 CLI
999
_c
11425
_d
11425