Ruger, Henry A. 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. New York: The Science Press, 1910.
Reference
- Object[5]
- no[5]
- no[5]
- historic[5]
- puzzle[5]
- reproduction[2]
- france[2]
- germany[2]
- new york[1]
- new york city[1]
- new york county[1]
- nuremburg[2]
- paris (france)[2]
- united states of america[1]
- the bowery[1]
- new york[2]
- new york city[2]
- yes[5]
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