TY  - BOOK
AU  - Willoughby,Stephen S
TI  - Mathematics education for a changing world
SN  - 9780871201751
AV  - QA11 
PY  - 1990///
CY  - Alexandria, Virginia
PB  - Association for Supervision and Curriculum Development
KW  - Mathematics
KW  - Study and teaching
N1  - 1; 2
ER  -