000
00306nam a2200133Ia 4500
008
190710s9999 xx 000 0 und d
082
_a
517.521 Sh
100
_a
Sharma, Har Swarup
245
0
_a
Set theory
250
_a
3rd ed
260
_a
Agra
_b
Ram Prasad and Sons
_c
1985
300
_a
76
942
_c
BK
999
_c
16012
_d
16012