1. Code of stratigraphic nomenclature;American Commission on Stratigraphic Nomenclature;Bull. Am. Assoc. Petrol. Geologists,1961
2. Cretaceous-Tertiary palynology, eastern side of the San Juan Basin, New Mexico;Anderson;New Mexico, Bur. Mines Mineral Resources, Mem.,1960
3. Sporae dispersae der Oberen Kreide von Gabun, Äquatoriales Afrika;Belsky;Paläontol. Z.,1965
4. Zonation of Cretaceous to Pliocene marine sediments based on planktonic Foraminifera;Bolli;Bol. Inform. Asoc. Venezolana Geol. Mineria Petrol.,1966
5. Spores et pollen du Crétacé supérieur du Gabon;Boltenhagen;Pollen Spores,1967