000
00246nam a2200109 4500
008
160616s 000 0
245
_a
Boolean algebras
100
_a
Sikorski, Roman
500
_a
B2M5 K4
942
_c
BK
_2
BK4853
080
_a
512.563 SIK
999
_c
4853
_d
4853