| 1 |
|
International Congress On Mathematical Education 1972 Exeter
|
|
2 |
| 2 |
|
International Congress On Mathematical Education 1980 University Of California Berkeley : 
|
1981 |
1 |
| 3 |
|
International Congress On Mathematical Education 1984 Adelaide Australia :
|
1985 |
1 |
| 4 |
|
International Congress On Mathematical Education 1984 Adelaide S Aust :
|
c1985 |
1 |
| 5 |
|
International Congress On Mathematical Education 1988 Budapest Hungary
|
|
2 |
| 6 |
|
International Congress On Mathematical Education 1992 Quebec Quebec
|
|
3 |
