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	1.	What do rooks (Corvus frugilegus) understand about physical contact? [electronic resource] by Helme, Anne E Clayton, Nicola S Emery, Nathan J Producer: 20061222 In: Journal of comparative psychology (Washington, D.C. : 1983) vol. 120 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	2.	What do bonobos (Pan paniscus) understand about physical contact? [electronic resource] by Helme, Anne E Call, Josep Clayton, Nicola S Emery, Nathan J Producer: 20061222 In: Journal of comparative psychology (Washington, D.C. : 1983) vol. 120 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)

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