TY  - BOOK
AU  - Steen
TI  - On the Shoulders of Giants : New Approaches to Numeracy
SN  - 0-309-04234-8
PY  - 1990///
CY  - Washington
PB  - National Academy Press
KW  - Didactica matematicii
KW  - 37.016:51=111
KW  - 51(072)=111
ER  -