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- catalog contributor b4564205.
- catalog created "1960.]".
- catalog date "1960".
- catalog date "1960.]".
- catalog dateCopyrighted "1960.]".
- catalog extent "vi, 40 p.".
- catalog issued "1960".
- catalog issued "1960.]".
- catalog language "eng".
- catalog publisher "London, E[ducational] S[upply] A[ssociation,".
- catalog subject "Child development.".
- catalog subject "Number concept.".
- catalog subject "Piaget, Jean, 1896-1980. Genèse du nombre chez l'enfant. English.".
- catalog title "New light on children's ideas of number; the work of Professor Piaget.".
- catalog type "text".