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Industrial Series, No. 1[-7]: (Bureau publication, no. 18) List of references on child labor, compiled under the direction of H. H. B. Meyer, with the assistance of Laura A. Thompson. 1916

United States. Children's Bureau

出版	U.S. Government Printing Office, 1916
URL	http://books.google.com.hk/books?id=9BJFAQAAMAAJ&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN