Frederiksen, Norman O. Upper Paleocene and lowermost Eocene angiosperm pollen biostratigraphy of the eastern Gulf Coast and Virginia - New York Micropaleontology Press Spring 1998 - pp. 45-68 láms. ISSN: 0026-2803 Subjects--Topical Terms: BIOESTRATIGRAFIAEOCENOPALEOCENOPOLEN Y ESPORAS Subjects--Geographic Terms: ESTADOS UNIDOS