Helmstadter ,G.C <br/><br/>
Principles of Psychological Measurement  
G.C.Helmstadter 
 - New York  Appleton-Century-Crofts  1964 
 - 248 p.  Photo copy 
 - Principles of Psychological Measurement  .
<br/><br/><label>ISSN: </label>
<br/><br/><label>Dewey Class. No.: </label>151.5 HEL 1964