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- 40009502 contributor B960820.
- 40009502 contributor B960821.
- 40009502 contributor B960822.
- 40009502 created "[1939]".
- 40009502 date "1939".
- 40009502 date "[1939]".
- 40009502 dateCopyrighted "[1939]".
- 40009502 extent "47 p.".
- 40009502 issued "1939".
- 40009502 issued "[1939]".
- 40009502 language "eng".
- 40009502 publisher "Cambridge, Mass., Graduate School of Education, Harvard University".
- 40009502 subject "331.7".
- 40009502 subject "HB2581 .R8".
- 40009502 subject "Occupations Classification.".
- 40009502 subject "Professions Classification.".
- 40009502 title "An occupational classification for research workers; college graduates--men, by Phillip J. Rulon and Robert J. Blanton.".
- 40009502 type "text".