TY  - BOOK
AU  - Averbach,Bonnie
AU  - Chein,Orin
TI  - Mathematics: problem solving through recreational mathematics 
T2  - Books in the mathematical sciences
SN  - 0-7167-1124-9
PY  - 1980///
CY  - New York
PB  - W.H.Freeman and Company
KW  - Matemáticas recreativas
N1  - Bibliografía
ER  -