- Wundt, Wilhelm Max, 1832-1920 (3)
- Federn, Etta (2)
- Law, A. Maurice (2)
- Denney, Reuel (1)
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- Hellpach, Willy, 1877-1955 (1)
- Hofmann, Paul, 1880-1947 (1)
- Kultschytskyj, Alexander von (1)
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