1. Urban land, urban tree cover and urban impervious cover by conterminous United States counties from 2010 to 2060
- Author(s):
- Nowak, David J.; Greenfield, Eric J.
2. Historical woodland density of the conterminous United States, 1873
- Author(s):
- Liknes, Greg C.; Nelson, Mark D.; Kaisershot, Daniel J.