Kidder, Louise H.. <br/><br/>
Research Methods in Social Relations /  

 - Fourth Ed. /  
 - New York :   Holt, Rinehart and Winston ,   1983 
 - p.483,xii :  
<br/><br/><label>ISBN: </label>4-8337-0008-5 
<br/><br/><label>Dewey Class. No.: </label>SZb4  / M1