Vegetational history in Western Interior North Ame during the Cretaceous-Tertiary transition. (Principles and Applications. Applications. J.Jansonius and D.C.McGregor, editors.)
Reference:
Nichols,D.J. (1996)
Vegetational history in Western Interior North Ame during the Cretaceous-Tertiary transition. (Principles and Applications. Applications. J.Jansonius and D.C.McGregor, editors.) American Association of Stratigraphic Palynologists:Principles and Applications. Applications (J.Jansonius and D.C.McGregor,Editors)
Vol. 3 P. 1189- 1195