Kolen, Michael J. <br/><br/>
Test equating, scaling, and linking  methods and practices 

 - New York  Springer  2004 
 - 548 p.  19 cm. 
<br/><br/> Statistics for social sciences and public policy 
<br/><br/><label>ISBN: </label>9781441923042 
<br/><br/><label>Dewey Class. No.: </label>371.27 KOL