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- 39021820 contributor B947306.
- 39021820 created "1938.".
- 39021820 date "1938".
- 39021820 date "1938.".
- 39021820 dateCopyrighted "1938.".
- 39021820 description "Thesis (Ph. D.)--University of Pennsylvania, 1936.".
- 39021820 extent "1 p. l., p. 295-306.".
- 39021820 issued "1938".
- 39021820 issued "1938.".
- 39021820 language "eng".
- 39021820 publisher "Philadelphia,".
- 39021820 subject "658.542".
- 39021820 subject "Ability Testing.".
- 39021820 subject "Age.".
- 39021820 subject "T58 .S62 1936".
- 39021820 title "Age and performance on a repetitive manual task [by] Kinsley R. Smith.".
- 39021820 type "text".