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| Author | Title | Year | Publication | Serial | Volume  |
Pages |
|---|---|---|---|---|---|---|
| Birch, H.G. | The relation of previous experience to insightful problem-solving | 1945 | Journal of Comparative Psychology | 6554 | 38 | 367-383 |
| HARPER F | Extinct and vanishing mammals., | 1945 | 1161 | 12 | 322-371 |