The Work Sampling System. 

 - 3rd ed. 
 - NY  Pearson  <c2001  > 
 - Xx228  Ill 
<br/><br/><label>ISBN: </label>1572122021 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Child development--Evaluation.<br/>Performance in children--Evaluation.<br/>Early childhood education<br/>Work sampling
<br/><br/><label>LC Class. No.: </label>LB1115  / .W85 1994