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| Author |
Title | Year | Publication | Serial | Volume | Pages |
|---|---|---|---|---|---|---|
| Pfungst, O. | Der Kluge Hans. Ein Beitrag zur nichtverbalen Kommunikation. | 1907 | 4737 | |||
| Pocock Ri, | Notes on the quagga and Burchell's Zebra in the Paris Museum | 1907 | 1477 | 7 | 516-521 |