TY  - GEN
TY  - GEN
T1  - Proceedings of the 21st Conference of the International Group for the Psychology of Mathematics Education. Volume 2
A2  - Pehkonen, Erkki, 1941-
A2  - University of Helsinki
A2  - Lahti Research and Training Centre
A2  - PME
A2  - Conference of the International Group for the Psychology of Mathematics Education
LA  - eng
PP  - Lahti
PB  - University of Helsinki, Lahti Research and Training Centre
YR  - 1997
UL  - https://kansalliskirjasto.finna.fi/Record/fikka.3811532
NO  - ISSN 0771-100X.
NO  - PME 21, July 14-19 1997, Lahti, Finland.
KW  - matematiikka
KW  - didaktiikka
KW  - opetus
KW  - oppimispsykologia
KW  - kasvatuspsykologia
ER  -