Babbie, Earl R. <br/><br/>
Survey research methods / 
Earl Babbie. 
 - Belmont, Ca. :  Wadsworth Publishing Co.,  1973. 
 - 384 p. ;  25 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0534002242 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Research.<br/>Social surveys.