Gebremedhin, Tesfa G. | Tweeten, Luther G. <br/><br/>
Research Methods and Communication in the Social Sciences 
Gebremedhin, Tesfa G. | Tweeten, Luther G. 
 - London  ABC-CLIO  1994 
 - 167p. 
<br/><br/><label>ISBN: </label>275949303 
<br/><br/><label>Source: </label>Textbook