Hottinger, L. (1975): Late Oligocene larger foraminifera from Koko Guyot, Site 309. Texas A & M University, Ocean Drilling Program, College Station, TX, United States, Initial Reports of the Deep Sea Drilling Project, 32 (Hakodate, Japan to Honolulu, Hawaii, Aug.-Oct., 1973), 825-826, georefid:1976-009739