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2.
HindeR. A. (1966). Animal Behaviour: A Synthesis of Ethology and Comparative Psychology, McGraw-Hill, New York.
3.
HuxleyJ. S. (Ed.) (1966). A discussion on ritualisation of behaviour in animals and man. Phil. Trans. Roy. Soc. B., 251: 247.
4.
(Important contributions in the Symposium include K. Lorenz: Ethological approach and phylogenetic ritualisation, and Ritualisation in the psycho-social climate of human culture; W. H. Thorpe, Ritualisation in Ontogeny).
5.
MitfordNancy (Ed.) (1956). Noblesse Oblige. Penguin, Harmondsworth (includes Ross, A. S. C., U and non-U: an essay in sociological linguistics).
6.
MortonJ. E. (1972). Man, Science and God. Collins, London.
7.
TinbergenN. (1951). The Study of Instinct. Oxford University Press, London.