Butler, Charles Henry,  1894- <br/><br/>
The teaching of secondary mathematics / 
Charles H. Butler, F. Lynwood Wren. 
 - 4th ed. 
 - New York :  McGraw-Hill,  [1965]. 
 - 613 p. 
 - Supervision curriculum and methods in education McGraw-Hill series in education. .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Study and teaching (Secondary).