Reference:Harland et al. 1982
From Global Warming Art
Harland, W.B., A.V. Cox, P.G. Llewellyn, C.A.G. Picton, A.G. Smith, R.W. Walters, and K.E. Fawcett (1982). A Geologic Time Scale. Cambridge University Press. ISBN 0521257284.
Usage
The following pages on Global Warming Art refer to this reference:
