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6by Packard, Jane M., Seal, Ulysses S., Mech, L. David, Plotka, Edward D.Get access
Published in Zeitschrift für Tierpsychologie (1985)
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7by Orbach, Dara N., Packard, Jane M., Keener, William, Ziltener, Angela, Würsig, BerndGet access
Published in Journal of Comparative Psychology (2019)
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