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Singer, Peter <1946- >
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Lorenz, Konrad
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Piccolino, Marco
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Griffin, Donald R.
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Mainardi, Danilo
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Lorenz, Konrad
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Mainardi, Danilo
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Masson, J. Moussaieff
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Mainardi, Danilo
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Lindauer, Martin
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Haskell, David George
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Birkhead, Tim
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Bettini, Maurizio <1947- >
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Regan, Tom
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Manning, Aubrey
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Von Kreisler, Kristin
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Levi, Carlo <1902-1975>
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Lewinsohn, Richard <1894-1968>
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Waal, Frans : de
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Lorenz, Konrad
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Morris, Desmond
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Lorenz, Konrad
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Paravicini Bagliani, Agostino
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Mohnhaupt, Jan
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