References
Hecht, J. (1998) ‘The geological timescale’ (Inside Science, No. 81), New Scientist, vol. 1978, 20 May.
Myers, N. and Kent, J. (eds) (2005) The New Gaia Atlas of Planet Management, London, Gaia Books.
The Open University (2013) Y033 Block 1: Life, Milton Keynes, The Open University.