Conference on Oridnnal Scales of Cognitive Developement <br/><br/>
Measurement and piaget / 
Donald Ross Green and others 
 - New York :  McGraw-Hill,  1971 
 - 283p. 23cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cognition in children.<br/>Scale analysis (Psychology)
<br/><br/><label>Dewey Class. No.: </label>155.41390  / CON