Ritchie, Robert W. <br/><br/>
New Directions in Mathematics / 
Robert W. Ritchie 
 - USA :  Prentice-Hall;  1953 
 - 124 p,;  22 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>510  / RIt 1962