Ayres, Leonard Porter,  1879-1946. <br/><br/>
Some conditions affecting problems of industrial education in 78 American school systems 
[by] Leonard P. Ayres, Ph.D. 
 - New York,  Division of education, Russell Sage foundation,  [1914] 
 - 22 p.  23 cm. 
 - [Russell Sage foundation, New York. Division of education. Pamphlets] E135 .
<br/><br/>
<br/><br/><label>LCCN: </label>e  14000433  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Technical education--United States.
<br/><br/><label>LC Class. No.: </label>LC1081  / .A8