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  • Title: Tertiary geology of the coastal plains of Puerto Rico
  • Author(s): Zapp, A.D., Bergquist, H.R., and Thomas, C.R.
  • Publishing Organization: U.S. Geological Survey
  • Series and Number: Oil and Gas Investigations Map OM-85
  • Publication Date: 1948
  • Map Scale: 1:60,000
  • Cross Section: Yes
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