Charts. Delaware River. Wilmington to Philadelphia, control by C. & G. Survey, surveys by U. S. Engineers to 1924 and other sources; chart 295. Scale 1:40,000.
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Delaware River. Wilmington to Philadelphia, control by C. & G. Survey, surveys by U. S. Engineers to 1924 and other sources; chart 295. Scale 1:40,000.
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Charts. Delaware River. Wilmington to Philadelphia, control by C. & G. Survey, surveys by U. S. Engineers to 1924 and other sources; chart 295. Scale 1:40,000.