Charts. Potomac River, Mattawoman Creek to Georgetown, surveys to 1925, surveys by U. S. Engineers to 1931, and other sources; with inset, Washington Harbor; chart 560. Scale 1:40.000.
Publication Title:
Potomac River, Mattawoman Creek to Georgetown, surveys to 1925, surveys by U. S. Engineers to 1931, and other sources; with inset, Washington Harbor; chart 560. Scale 1:40.000.
Display Title:
Charts. Potomac River, Mattawoman Creek to Georgetown, surveys to 1925, surveys by U. S. Engineers to 1931, and other sources; with inset, Washington Harbor; chart 560. Scale 1:40.000.