Premoli Silva, Isabella; Bolli, Hans M. (1973): Late Cretaceous to Eocene planktonic foraminifera and stratigraphy of the Leg 15 sites in the Caribbean Sea. Texas A & M University, Ocean Drilling Program, College Station, TX, United States, In: Edgar, N. Terence, Saunders, John B., Bolli, Hans M., Boyce, Robert E., Broecker, Wallace S., Donnelly, Thomas W., Gieskes, Joris M., Hay, William W., Horowitz, Ross M., Maurrasse, Florentin, Perez Nieto, Hernan, Prell, Warren, Premoli Silva, Isabella, Riedel, William R., Schneidermann, Nahum, Waterman, Lee S., Kaneps, Ansis G. (editor), Herring, James R. (editor), Initial reports of the Deep Sea Drilling Project, covering Leg 15 of the cruises of the drilling vessel Glomar Challenger, San Juan, Puerto Rico to Cristobal, Panama; December 1970-February 1971, 15, 499-547, georefid:1983-010591