TY  - BOOK
AU  - Mammana, Carmelo.
AU  - Vinicio, Villani.
TI  - Perspectives on the teaching of geometry for the 21st century: o n ICMI study 
SN  - 0792349903
U1  - 516.07 
PY  - 1998///
CY  - Dordrecht
PB  - Kluwer Academic Publishers
KW  - Geometry
KW  - Study and teaching
N1  - Includes index
ER  -