Hart, Walter W. <br/><br/>
Mathematics in action, book three / 
Walter W. Walter W.Hart 
 - Boston :      D.C. Heath ,  1940 
 - v, 442p. :  ill. ;  18 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>510  / HAR