Cluster analysis by linear contrasts 
Educational Testing Sevice 
 - New Jersey, USA  Educational Testing Sevice  1972 
<br/><br/><br/>Research Bullentin No. 72-35 
<br/><br/><label>Source: </label>Books to be hide in OPAC 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Bibliography