TY  - BOOK
AU  - Freudenthal,Hans
TI  - Mathematics as an educational task
SN  - 9027702357 :
AV  - QA11 .F77 1973
PY  - 1973///]
CY  - Dordrecht
PB  - Reidel.
KW  - Mathematics
KW  - Study and teaching
N1  - Bibliography: p. [678]-680
ER  -