Natland, James H.; Rosendahl, Bruce R. (1980): Drilling difficulties in basement during Deep Sea Drilling Project Leg 54. Texas A & M University, Ocean Drilling Program, College Station, TX, United States, In: Powell, Robert (editor), Rosendahl, Bruce R., Hekinian, Roger, Briqueu, Louis, Dmitriev, Yuri, Fodor, Ronald V., Goll, Robert M., Hoffert, Michel, Humphris, Susan E., Mattey, David P., Natland, James H., Petersen, Nikolai, Roggenthen, William, Schrader, Edward L., Srivastava, Ramesh K., Warren, Nick, Barron, John A., Bukry, David, Lynts, George W., Leg 54 of the cruises of the drilling vessel Glomar Challenger; Cristobal, Panama Canal Zone to Long Beach, California; May-June 1977, 54, 593-604, georefid:1981-038736