2.
Alex & Me: How a Scientist and a Parrot Discovered a Hidden World of Animal Intelligence--An...
by Irene M. Pepperberg
ISBN: 9784344019317
List Price: $46.80
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Animal Cognition in Nature: the Convergence of Psychology and Biology in Laboratory and Field
by Al, Balda, Pepperberg, Iren...
ISBN: 9780080527239