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Calder, N. 1972: Restless earth. London: British Broadcasting Corporation. (152 pp.)

Gass, I. G. , Smith, P. J. and Wilson, R. C. L. , editors, 1971: Understanding the earth: a reader in the earth sciences . Horsham: Artemis Press for The Open University Press. (355 PP.)

Searle, J.R. 1972: The campus war. Harmondsworth: Penguin. (219 pp.)