Okada, Hakuyu (1980): Pebbles and carbonate nodules from Deep Sea Drilling Project Leg 56 cores. Texas A & M University, Ocean Drilling Program, College Station, TX, United States, In: Lee, Marianna (editor), Stout, Larry N. (editor), Langseth, Marcus, Okada, Hakuyu, Adelseck, Charles G., Jr., Bruns, T. R., Harper, Howard E., Jr., Kurnosov, V., Mueller, German, Murdmaa, I., Pisciotto, Kenneth A., Robinson, Paul, Sakai, Toyosaburo, Thompson, Peter R., Whelan, J. K., Wories, Henk, von Huene, Roland, Nasu, Noriyuki, Arthur, Michael A., Barron, John A., Bell, Gary D., Cadet, Jean Paul, Carson, Bobb, Fujioka, Kantaro, Honza, Eiichi, Keller, Gerta, Moore, George W., Reynolds, Richard, Sato, Shunji, Shaffer, Bernard L., Legs 56 and 57 of the cruises of the drilling vessel Glomar Challenger; Yokohama, Japan to Yokohama, Japan; Leg 56, September-October 1977; Leg 57, October-December 1977; Part 2, 56-57, Part 2, 1089-1106, georefid:1981-030662