Carlson, R. L.; Christensen, N. I.; Wilkens, R. H. (1980): Acoustic properties of volcaniclastic sediments recovered from the floor of the Philippine Sea, Deep Sea Drilling Project Leg 59. Texas A & M University, Ocean Drilling Program, College Station, TX, United States, In: Kroenke, Loren, Scott, Robert B., Balshaw, Katherine M., Brassell, Simon C., Chotin, Pierre, Heiman, Mary E., Ishii, Teruaki, Keating, Barbara H., Martini, Erlend, Mattey, David P., Rodolfo, Kelvin S., Sartori, Renzo, Theyer, Fritz, Usher, John L., Zakariadze, Guram, Orlofsky, Susan (editor), Leg 59 of the cruises of the drilling vessel Glomar Challenger, Naha, Okinawa to Apra, Guam; February-March 1978, 59, 519-522, georefid:1981-053803