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- catalog contributor b8388841.
- catalog contributor b8388842.
- catalog contributor b8388843.
- catalog contributor b8388844.
- catalog created "1929]".
- catalog date "1929".
- catalog date "1929]".
- catalog dateCopyrighted "1929]".
- catalog extent "38 p.".
- catalog issued "1929".
- catalog issued "1929]".
- catalog language "eng".
- catalog publisher "[Baltimore,".
- catalog spatial "Maryland.".
- catalog subject "Child labor Maryland.".
- catalog subject "Children with disabilities.".
- catalog subject "Mental efficiency.".
- catalog subject "Stupidity.".
- catalog title "The mentally and educationally retarded child laborer. A study of one hundred applicants for special work permits. April, 1929.".
- catalog type "text".