TY  - BOOK
AU  - Averbach,Bonnie
AU  - Chein,Orin
TI  - Mathematics: problem solving through recreational mathematics 
SN  - 0716711249
PY  - 1980///
CY  - San Francisco
PB  - W. H. Freeman
KW  - Mathematics
KW  - 1961-
KW  - Mathematical recreations
KW  - Problem solving
N1  - Includes index; Bibliography : p. 336-339
ER  -