Development of distance conservation and the spatial coordinate system reconsidered
By: Mary Vandeventer
Series: Research bulletin -- 68; Research bulletin (Educational Testing Service) -- RB-68-68
Publisher: Educational Testing service
Published: 1968
Place of publication: Princeton, New Jersey
Language: eng
Number of pages: 12
Subjects: Conservation of substance (Psychology); Educational tests and measurements; Child psychology
Notes: This bulletin is a draft for interoffice circulation. It is automatically superseded upon formal publication of the material.--T.p.

"December 1968."

Includes bibliographical references (leaf 10).