Nautical charts. Henlopen, Cape. Cape Henlopen and Delaware Breakwater, surveys to 1933, surveys by U. S. Engineers to 1937; chart 379. Scale 1:20,000.
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Henlopen, Cape. Cape Henlopen and Delaware Breakwater, surveys to 1933, surveys by U. S. Engineers to 1937; chart 379. Scale 1:20,000.
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Nautical charts. Henlopen, Cape. Cape Henlopen and Delaware Breakwater, surveys to 1933, surveys by U. S. Engineers to 1937; chart 379. Scale 1:20,000.