TY  - BOOK
AU  - Freudenthal, Hans.
TI  - Weeding and sowing: preface to a science of mathematical education 
SN  - 9027710724
PY  - 1980///
CY  - Dordrecht, Holland
PB  - D. Reidel
KW  - Mathematics
KW  - Study and teaching
KW  - Education
KW  - Sicence
ER  -