Charts. Delaware River, Wilmington to Philadelphia, topography from surveys to 1889, hydrography from U. S. Engineers to 1915; chart 295. Scale 1:40,000.
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Delaware River, Wilmington to Philadelphia, topography from surveys to 1889, hydrography from U. S. Engineers to 1915; chart 295. Scale 1:40,000.
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Charts. Delaware River, Wilmington to Philadelphia, topography from surveys to 1889, hydrography from U. S. Engineers to 1915; chart 295. Scale 1:40,000.