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Author Title Year Publication Serial Volume Pages
Flavell JH The development of children's knowledge about the appearance-reality distinction 1986 Am. Psychol. 2992 41 418
Kortlandt A The use of tools by wild-living chimpanzees and earliest hominids 1986 J. Hum. Evol., 3012 15 77
Voith, V.L. Principles of learning 1986 The Veterinary clinics of North America. Equine practice 4547 2 485-506
Goodall, J. The Chimpanzees of Gombe 1986 4890