Manum and Cookson, 1964
From dinoflaj2
Manum, S.B. and Cookson, I.C., 1964: Cretaceous microplankton in a sample from Graham Island, arctic Canada, collected during the second "Fram" expedition (1898-1902). With notes on microplankton from the Hassel Formation, Ellef Ringnes Island. Norske Videnskaps-Akademi i Oslo, I. Matematisk-Naturvidenskapelig Klasse, Skrifter, Ny Serie, no.17, p.1-36, pl.1-7.
