TY  - BOOK
AU  - G Polya
TI  - Patterns of plausible inference. Ed.2. 
U1  - 511.3 
PY  - 1968///
CY  - Princeton
PB  - Princeton University Press
N1  - G Polya: Patterns of plausible inference. Ed.2..  (2nd Edition)  Princeton.  Princeton University Press, 1968.--(511.3POL)
ER  -