Charts. Potomac River, Md.-Va.-D. C., Mattowoman Creek to Georgetown, surveys to 1925, surveys by U. S. Engineers to 1934, and other sources; with inset, Washington Harbor; chart 560. Scale 1:40,000.
Publication Title:
Potomac River, Md.-Va.-D. C., Mattowoman Creek to Georgetown, surveys to 1925, surveys by U. S. Engineers to 1934, and other sources; with inset, Washington Harbor; chart 560. Scale 1:40,000.
Display Title:
Charts. Potomac River, Md.-Va.-D. C., Mattowoman Creek to Georgetown, surveys to 1925, surveys by U. S. Engineers to 1934, and other sources; with inset, Washington Harbor; chart 560. Scale 1:40,000.