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1. The Alex studies by Pepperberg, Irene M. Publication: Cambridge, Mass. ; | London : Harvard University Press, 2002 . 1 online resource (448 p.) : , Originally published: 2000. Date:2002 Availability: No items available: Actions: Add to cart
2. Animal cognition in nature   Publication: San Diego [Calif.] : Academic Press, 1998 . 1 online resource (ix, 465 p.) : Date:1998 Availability: No items available: Actions: Add to cart