A comparative study of the occupations and wages of the children of working age in Potter and Durham schools, Philadelphia. 
Made under the auspices of the Armstrong Association of Philadelphia. 
 - [Philadelphia,  Printed by pupils at the Philadelphia trades school]  1913. 
 - 20 p.  23 cm. 
<br/><br/><label>LCCN: </label>e  15001132  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Child labor--Pennsylvania--Philadelphia.
<br/><br/><label>LC Class. No.: </label>HD6250.U5  / A8