TY  - GEN
AU  - Cadwell, J. H
TI  - Topics in recreational mathematics
U1  - 51-8 
PY  - 1966///
CY  - Cambridge
PB  - Cambridge at the University Press
KW  - Matematica recreativa
KW  - Geometrie
KW  - Problema celor patru culori
KW  - Suprafete algebrice
N1  - Contine bibliogr. dupa cap. si index
ER  -