1. American Seashells;Abbott,1954
2. Sediment cores from the east Pacific;Arrhenius;Rep. Swed. deep Sea Exped.,1952
3. Comparison of clay from the continental shelf off Long Island with the Gardiners clay;Athearn;J. Geol.,1957
4. Geology and biology of north Atlantic deep-sea cores between Newfoundland and Ireland;Bradley;U.S. Geol. Surv. Prof. Paper,1942
5. Deciduous forest of eastern North America;Braun,1950