Morelock, J. (2005). MorphologyArxivat 2007-01-06 a Wayback Machine.. Geological Oceanography Program, University of Puerto Rico at Mayagüez (UPRM). Retrieved on: October 11, 2008.
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Morelock, J. (2005). MorphologyArxivat 2007-01-06 a Wayback Machine.. Geological Oceanography Program, University of Puerto Rico at Mayagüez (UPRM). Retrieved on: October 11, 2008.