Initial reports of the Deep Sea Drilling Project : a project planned by and carried out with the advice of the Joint Oceanographic Institutions for Deep Earth Sampling (JOIDES). Volume LXXVII, covering leg 77 of the cruises of the drilling vessel Glomar Challenger, Ft. Lauderdale, Florida, to San Juan, Puerto Rico, December 1980-February 1981
prepared for the National Science Foundation, National Ocean Sediment Coring Program, under contract C-482, by the University of California, Scripps Institution of Oceanography