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- catalog contributor b6451731.
- catalog created "1910.".
- catalog date "1910".
- catalog date "1910.".
- catalog dateCopyrighted "1910.".
- catalog extent "iv, 88 p. :".
- catalog isPartOf "Archives of psychology".
- catalog isPartOf "Columbia contributions to philosophy and psychology, vol. xix, no. 2.".
- catalog issued "1910".
- catalog issued "1910.".
- catalog language "eng".
- catalog publisher "New York : The Science press".
- catalog subject "Ability.".
- catalog subject "BF21 .A7".
- 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".