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- catalog contributor b4394062.
- catalog created "1926.".
- catalog date "1926".
- catalog date "1926.".
- catalog dateCopyrighted "1926.".
- catalog extent "iv, 88 p. :".
- catalog isPartOf "Archives of psychology".
- catalog isPartOf "Teachers College educational reprints, no.5".
- catalog issued "1926".
- catalog issued "1926.".
- catalog language "eng".
- catalog publisher "New York : Teachers College, Columbia University,".
- catalog subject "Ability.".
- catalog subject "Learning.".
- catalog subject "Psychological Tests.".
- catalog subject "Puzzles.".
- catalog title "The psychology of efficiency ; an experimental study of the processes involved in the solution of mechanical puzzles and in the acquisition of skill in their manipulation / by Henry A. Ruger.".
- catalog type "text".