Powell, R. (ed.); Laughter, F. (ed.) (1980): Initial reports of the Deep Sea Drilling Project covering Legs 51, 52, and 53 of the cruises of the drilling vessel Glomar Challenger, San Juan, Puerto Rico to San Juan, Puerto Rico; November 1976-April 1977. Texas A & M University, Ocean Drilling Program, College Station, TX, United States, Initial Reports of the Deep Sea Drilling Project, 718 pp., georefid:1980-044448