1. National river recreation study data: a nationwide survey of river recreation use from 1977-1984
- Author(s):
- Cole, David N.
2. scounty100: County boundaries of the Southern United States at 1:100,000 scale
- Author(s):
- Negri, M.; Yockey, Edwin
3. scounty2m: County boundaries of the Southern United States at 1:2,000,000 scale
- Author(s):
- Yockey, Edwin