01222nam0-2200349-i-450-99000929879040332120101215145056.0000929879FED01000929879(Aleph)000929879FED0100092987920101215d1955----km-y0itay50------baengBRa---a---101yyProceedings of the 19th PME conference of the International group for the psychology of mathematics education, Recife, Brazil, July 22-27, 1995Luciano Meira, David Carraher, editorsPernambucoUniversitade Federalde Pernambuco19952 v.21Psycology of mathematics education19Educazione matematica372.721itaMeira,LucianoCarraher,DavidITUNINAREICATUNIMARCBK990009298790403321CPDM-97-094-(1219MA1CPDM-97-094-(3221MA1MA197-XXProceedings of the 19th PME conference of the International group for the psychology of mathematics education, Recife, Brazil, July 22-27, 1995770455UNINA