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	1.	Piaget's theory of intellectual development; [electronic resource] an introduction [by] Herbert Ginsburg and Sylvia Opper. by Ginsburg, Herbert Opper, Sylvia [joint author.] Series: The Prentice-Hall series in developmental psychology Material type: Text; Format: print available online ; Literary form: Not fiction Publication details: Englewood Cliffs, N.J., Prentice-Hall [1969] Online resources: Free eBook from the Internet Archive Additional information and access via Open Library Availability: No items available. Add to cart (remove)
	2.	Piaget's theory of intellectual development / [electronic resource] Herbert Ginsburg, Sylvia Opper. by Ginsburg, Herbert Opper, Sylvia [joint author.] Edition: 2d ed. Material type: Text; Format: print available online ; Literary form: Not fiction Publication details: Englewood Cliffs, N.J. : Prentice-Hall, c1979 Online resources: Free eBook from the Internet Archive Additional information and access via Open Library Availability: No items available. Add to cart (remove)

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