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1nork Anthony, GlendaGaiak “...Arithmetic Study and teaching (Elementary) Psychological aspects....”
Argitaratua 1999
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11Argitaratua 2008GaiakLiburua
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13nork Hodgen, EdithGaiak “...Early childhood education Psychological aspects New Zealand Wellington (Region) Longitudinal studies....”
Argitaratua 2007
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