000
00251nam a2200109 4500
008
160616s 000 0
245
_a
Abstract set theory
100
_a
Skolem, Thoralf A
500
_a
B31 K210
942
_c
BK
_2
BK902
_0
1
080
_a
510.21 SKO
999
_c
902
_d
902