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 (1982): 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. Texas A & M University, Ocean Drilling Program, College Station, TX, United States, Initial Reports of the Deep Sea Drilling Project, 68, 495 pp., georefid:1983-006949