The employment-certificate system : a safeguard for the working child.

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Bibliographic Details
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Corporate Author: United States. Children's Bureau
Format: Government Document Book
Language:English
Published: Washington : U.S. Dept. of Labor, Children's Bureau : G.P.O., 1921.
Edition:Rev.
Series:Industrial series (United States. Children's Bureau) ; no. 7.
Bureau publication (United States. Children's Bureau) ; no. 56 (Rev.)
Subjects: