Roberts, David G.; Schnitker, Detmar; Baldauf, Jack G.; Desprairies, Alain; Homrighausen, Reiner; Huddlestun, Paul F.; Kaltenback, Alfred J.; Krumsiek, Klaus A. O.; Morton, Andrew C.; Murray, John W.; Westberg-Smith, Jean; Zimmerman, Herman B.; Keene, John B.; Backman, Jan (ed.) (1984): Initial reports of the Deep Sea Drilling Project covering Leg 81 of the cruises of the drilling vessel Glomar Challenger; Southampton, United Kingdom, to Ponta Delgada, Azores Islands, July-September, 1981. Texas A & M University, Ocean Drilling Program, College Station, TX, United States, Initial Reports of the Deep Sea Drilling Project, 81, 923 pp., georefid:1985-047596