Chapin, F. Stuart. <br/><br/>
Experimental designs in sociological research / 
by F. Stuart Chapin 
 - New York :  Harper,  1947. 
 - 206 p. ;  21 cm. 
<br/><br/> Book is photocopy 
<br/><br/>Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sociology.