TY  - BOOK
AU  - Freudenthal, Hans
TI  - Weeding and Sowing: Preface to a Science of Mathematical Education
SN  - 9027707898
U1  - 375.51 
PY  - 1978///
CY  - Dordrecht-holland
PB  - D Reidel Publishing Company
KW  - Education
ER  -