File:Assessing African grey parrots' prosocial tendencies in a token choice paradigm.pdf
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![File:Assessing African grey parrots' prosocial tendencies in a token choice paradigm.pdf](https://upload.wikimedia.org/wikipedia/commons/thumb/9/91/Assessing_African_grey_parrots%27_prosocial_tendencies_in_a_token_choice_paradigm.pdf/page1-413px-Assessing_African_grey_parrots%27_prosocial_tendencies_in_a_token_choice_paradigm.pdf.jpg?20240621102612)
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