1. C. G., Adams: A reconsideration of the East Indian letter classification of the Tertiary, Bull. Br. Mus. nat. Hist. (Geol), 19, 87-137, 1970.
2. P. A., Adshead: Collection and laboratory maintenance of living planktonic foraminifera, Micropaleontology, 13, 32-40, 1967.
3. : Geological results of petroleum exploration in Western Papua, Geol. Soc. Australia, 133-1961.
4. O. L., Bandy: Restrictions of the “Orbulina” datum, Micropaleontology, 12, 79-86, 1966.
5. O. L., Bandy, E., Vincent and R. C., Wright: Chronologic relationships of Orbulines to the Globorotalia fohsi lineage, Revista Española Micropaleont, 1, 131-145, 1969.