Butler , Charles H.. <br/><br/>
The Teaching of Secondary Mathematics /  Textual Documents 
Charles H.Butler & F. Lynwood Wren. 
 - 1st ed. / 
 - New York :  McGraw - Hill book company ,  C1951. 
 - 550p. :  ill ;  23cm . 
<br/><br/><label>Subjects--Index Terms: </label>Mathematics Secondary Mathematics G-Mathematics 
<br/><br/><label>Dewey Class. No.: </label>510.7  / B 976 T