Jolley and Spinner, 1989
From dinoflaj2
Jolley, D.W. and Spinner, E., 1989: Some dinoflagellate cysts from the London Clay (Palaeocene-Eocene) near Ipswich, Suffolk, England. Review of Palaeobotany and Palynology, v.60, p.361-373, pl.1-2.
