Stevenson, P. R.  1886-1927. <br/><br/>
Smaller classes or larger;  a study of the relation of class-size to the efficiency of teaching. 

 - Bloomington, Ill.,  Public School Pub. Co.,  1923. 
 - 127 p.  tables.  24 cm. 
 - Journal of educational research. Monographs,  no. 4, 1923. .
<br/><br/> Issued also as thesis, Columbia University. 
<br/><br/><label>LCCN: </label>e  25000187  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Teaching.<br/>Class size.
<br/><br/><label>LC Class. No.: </label>LB1026  / .S7 1923a