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- a51005197 contributor B12863050.
- a51005197 created "1949.".
- a51005197 date "1949".
- a51005197 date "1949.".
- a51005197 dateCopyrighted "1949.".
- a51005197 description "Includes bibliography.".
- a51005197 description "Thesis - University of Maryland, College Park.".
- a51005197 extent "x, 120 l.".
- a51005197 issued "1949".
- a51005197 issued "1949.".
- a51005197 language "eng".
- a51005197 subject "BF205.M6 M3".
- a51005197 subject "Educational psychology.".
- a51005197 subject "Factor analysis.".
- a51005197 subject "Motivation (Psychology)".
- a51005197 title "A factorial study of incentives in certain learning and performance situations.".
- a51005197 type "text".