Simon, Julian L.  <br/><br/>
Basic research methods in social sciences :  the art of emphirical investigation / 
Julian L. Simon. 
 - 2nd ed. 
 - New York :  Random House,  c1978. 
 - xviii, 558 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0394320492