Judd, Charles M. <br/><br/>
Research methods in social relations 

 - 6th ed. 
 - Fort Worth:  Holt, Rinehart and Winston,  1991 
 - xii, 573 p.:  ill. ;  23cm 
<br/><br/><label>ISBN: </label>0030311497 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences - Research - Methodology