Michael, Peter J.; Bonatti, Enrico (1985): Petrology of ultramafic rocks from sites 556, 558, and 560 in the North Atlantic. Texas A & M University, Ocean Drilling Program, College Station, TX, United States, In: Bougault, Henri, Cande, Steven C., Brannon, Joyce C., Christie, David M., Clark, Murlene, Curtis, Doris Malkin, Drake, Natalie, Echols, Dorothy J., Hill, Ian Ashley, Khan, Mohammed Javed, Mills, William G., Neuser, Rolf, Rideout, Marion L., Weaver, Barry L., Whalen, Elizabeth (editor), Initial reports of the Deep Sea Drilling Project; covering Leg 82 of the cruises of the Drilling Vessel Glomar Challenger; Ponta Delgada, Azores, to Balboa, Panama; September-November 1981, 82, 523-528, georefid:1985-081671