| 1 |
no. 2 . Administration of child labor laws ; pt. 3
Employment-certificate system, Maryland / by Francis Henry Bird and Ella Arvilla Merrit
Washington : Government Printing Office , 1919
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| 2 |
no. 2 . Administration of child labor laws ; pt. 2
Employment-certificate system, New York / by Helen L. Sumner and Ethel E. Hanks
Washington : Government Printing Office , 1917
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| 3 |
no. 2 . Administration of child labor laws ; pt. 1
Employment-certificate system, Connecticut / by Helen L. Sumner and Ethel E. Hanks
Washington : Government Printing Office , 1915
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| 4 |
no. 3
List of references on child labor / compiled under the direction of H.H.B. Meyer ; with the assistance of Laura A. Thompson
Washington : Government Printing Office , 1916
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| 5 |
no. 4
Child labor in warring countries : a brief review of foreign reports / by Anna Rochester
Washington : Government Printing Office , 1917
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| 6 |
no. 5
Industrial instability of child workers : a study of employment-certificate records in Connecticut / by Robert Morse Woodbury
Washington : Government Printing Office , 1920
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