TY  - BOOK
AU  - Mammana, Carmelo
AU  - Villani, Vinicio
TI  - Perspectives on the teaching of geometry for the 21st century
SN  - 9780792349907
SN  - 98009444
U1  - 516.071 MAM 
PY  - 1998///
CY  - Dordrecht ; Boston
PB  - Kluwer Academic Publishers
KW  - Geometry - Study and teaching
N1  - Includes bibliographical references (p. 329-335) and index
ER  -