Keigwin, Lloyd D., Jr. (1982): Appendix; Basis for age assignments at Deep Sea Drilling Project sites 502 and 503. Texas A & M University, Ocean Drilling Program, College Station, TX, United States, In: Prell, Warren L., Gardner, James V., Adelseck, Charles G., Blechschmidt, Gretchen, Fleet, Andrew J., Keigwin, Lloyd D., Jr., Kent, Dennis V., Ledbetter, Michael T., Mann, Ulrich, Mayer, Larry A., Riedel, William R., Sancetta, Constance A., Spariosu, Dann J., Zimmerman, Herman B., Amidei, Rosemary, Lee, Marianna, Initial reports of the Deep Sea Drilling Project; covering Leg 68 of the cruises of the drilling vessel Glomar Challenger; Willemstad, Curacao to Guayaquil, Ecuador, 68, 493-445, georefid:1983-006973