Johnson, Robert Russell  1939. <br/><br/>
Elementary statistics/ 
Robert R. Johnson 
 - Sixth Edition 
 - Belmont, California:  Duxbury Press,  ©1992. 
 - xix, 733 pages:  illustrations (slightly color) ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0-534-92980-x 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Statistics
<br/><br/><label>Dewey Class. No.: </label>DC 519.5  / J62