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- catalog contributor b5547365.
- catalog created "1920.".
- catalog date "1920".
- catalog date "1920.".
- catalog dateCopyrighted "1920.".
- catalog extent "8 p. incl. tab., forms.".
- catalog issued "1920".
- catalog issued "1920.".
- catalog language "eng".
- catalog publisher "Boston, Wright and Potter Printing Company, State Printers,".
- catalog spatial "Massachusetts.".
- catalog subject "Adolescent".
- catalog subject "Child labor Massachusetts.".
- catalog subject "Employment".
- catalog subject "HD6243.U6 M4 1920a".
- catalog title "Health certificates for working children : recommendations regarding the issuing of health certificates to children entering industry, June, 1920.".
- catalog type "Legislation".
- catalog type "text".