Charts. Delaware River, Pa.-N. J., Wilmington to Philadelphia, surveys to 1925, surveys by U. S. Engineers to 1935, and other sources; chart 295. Scale 1:40,000.
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Delaware River, Pa.-N. J., Wilmington to Philadelphia, surveys to 1925, surveys by U. S. Engineers to 1935, and other sources; chart 295. Scale 1:40,000.
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Charts. Delaware River, Pa.-N. J., Wilmington to Philadelphia, surveys to 1925, surveys by U. S. Engineers to 1935, and other sources; chart 295. Scale 1:40,000.