The development of conservation and differentiation of number.

Bibliographic Details

Main Author:	Zimiles, Herbert
Format:	Book
Language:	English
Published:	[Chicago] : [Published by the University of Chicago Press for the Society for Research in Child Development], [1966]
Series:	Monographs of the Society for Research in Child Development ; v. 31, no. 6, serial no. 108.
Subjects:	Number concept.