Context

Context of Initial reports of the Deep Sea Drilling Project, Volumes LXXVIIIA and LXXVIIIB (two volumes in one), covering leg 78A of the cruises of the drilling vessel Glomar Challenger, San Juan, Puerto Rico, to San Juan, Puerto Rico, February-March, 1981 and covering leg 78B of the cruises of the drilling vessel Glomar Challenger, San Juan Puerto Rico, to Las Palmas, Grand Canary Island, March-April, 1981
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