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200 1 $aProceedings of the International Conference on the Psychology of mathematics education, PME XVII, Tsukuba, Japan, July 18-23, 1993$fIchiei Hirabayashi ... [et al.] editors
210   $aTsukuba$cUniversity of Tsukuba$d1993
215   $a3 v.$d22 cm
225 1 $aPsycology of mathematics education$v17
610 0 $aEducazione matematica
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996   $aProceedings of the International Conference on the Psychology of mathematics education, PME XVII, Tsukuba, Japan, July 18-23, 1993$9769209
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