000
00297nam a2200133Ia 4500
001
12691
008
170722s9999 xx 000 0 und d
100
_a
Polya G.
245
_a
Patterns of plausible inference /
260
_c
1954
653
_a
Mathematics
653
_a
Philosophy
942
_c
GEN
999
_c
25487
_d
25487