Curated by
ACT
A map from the 19th Annual Report of the U.S. Geological Survey (1898) showing areas of swamp and marsh lands in the United States at the time, with degrees of swampiness shown in two shadings.
3 Views
0 Downloads
A map from the 19th Annual Report of the U.S. Geological Survey (1898) showing areas of swamp and marsh lands in the United States at the time, with degrees of swampiness shown in two shadings.