Hartley, Alexandra S.; Siesser, William G. (2002): Do reversals of the Earth's magnetic field affect life on Earth? A biometric test of the hypothesis, using calcareous nannofossils. International Nannoplankton Association, The Hague, International, In: Anonymous, 9th International Nannoplankton Association conference; abstracts and programme, 24 (2), 112, georefid:2003-047271