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1973. 2012-12-10T20:39:48Z. 2013-03-18T20:49:58Z. Monroe, Watson Hiner, 1907-1992. U.S. Geological Survey. English. Public. Puerto Rico.
1968. 2012-10-09T16:53:58Z. 2013-03-18T22:22:35Z. Nelson, Arthur E. (Arthur Edward), 1922-. The Survey. English. Public. Puerto Rico.
1984. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey ; For sale by Branch of Distribution, USGS. English. Public. Puerto Rico.
1979. 2014-07-03T20:11:07Z. 2014-07-03T20:11:07Z. Rogers, C. L. (Cleaves L.), 1916-. The Survey. English. cartographic image. Public. Puerto Rico and Puerto Rico.
1971. 2012-11-07T20:10:19Z. 2022-07-11T15:27:14Z. McIntyre, David H. U.S. Geological Survey. English. Public. Puerto Rico.
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