Healey, Joseph F <br/><br/>
Statistics  a tool for social research 
Joseph F. Healey. 
 - 6th ed. 
 - Australia  Wadsworth Thomson Learning  2002 
 - xxi, 521p., 23cm. 
<br/><br/><label>ISBN: </label>0-534-55785-6. 
<br/><br/><label>Dewey Class. No.: </label>300.72  / H48S