Keller, G, and K Perch-Nielsen. 1995. “Cretaceous-Tertiary (K T) Mass Extinction: Effect of Global Change on Calcareous Microplankton”. In Effects of Past Global Change on Life, S. Stanley and J.P. Kennett (eds.), 72-93. National Academy of Science. Referenced from www.nap.edu: Cretaceous-Tertiary (K/T) mass extinction: effect of global change on calcareous microplankton.
G Keller
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G
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Keller