TY - JOUR A1 - Loizos, C. T1 - Play Behaviour in Higher Primates: A Review JF - D. Morris (Ed.), Primate Ethology, London (Weidenfeld and Nicolson) 1967, pp. 176-218. Caroline Y1 - 1967 ER - TY - JOUR A1 - Loizos, C. T1 - An ethological study of Chimpanzee play JF - C. R. Carpenter (Ed.) Behaviour, New York and Basel (S. Karger) 1969, pp. 87-93. Y1 - 1969 ER -