Tewksbury, John L. <br/><br/>
Nongrading in the elementary school 
[by] John L. Tewksbury. 
 - Columbus, Ohio  C. E. Merrill Books  [1967]. 
 - vi, 138 p.  ill.  23 cm. 
 - Merrill's international education series .
<br/><br/>Bibliography: p. 123-134. 
<br/><br/><label>LCCN: </label>67015145  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ability grouping in education
<br/><br/><label>LC Class. No.: </label>LB3061  / .T4 
<br/><br/><label>Dewey Class. No.: </label>372.1/2/55