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OCR-text (abbyy)
Duncker, Karl
On problem-solving. Transi. by Lynne S. Lees.
4:o Washington, D. C. 1945.
=Monographs, Psychological. ... Vol. 58:5.
OCR-text (abbyy-crop)
Duncker, Karl
On problem-solving. Transi, by Lynne S. Lees.
4:0 Washington, D. G. 1945.
-Monographs, Psychological. ... Vol. 58:5.
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