TY  - BOOK
AU  - Freudenthal,Hans
TI  - Mathematics as an educational task
SN  - 9027703221
AV  - QA11.2 FRE 
PY  - 1973///
CY  - Dordrecht-Holland
PB  - D.Reidel Publishing Company
KW  - Mathematics
KW  - Study and teaching
ER  -