1. Historical maps of land use in Puerto Rico in 1951
- Author(s):
- Helmer, Eileen H.; Córdova, Juan R.; Quiñones, Maya; Hubing, Nick
2. St. Kitts, Nevis, St. Eustatius, Grenada, and Barbados land cover and forest formations (1999-2003)
- Author(s):
- Helmer, Eileen H.; Kennaway, Todd A.; Pedreros, Diego H.; Clark, Matthew L.; Marcano-Vega, Humfredo; Tieszen, Larry L.; Ruzycki, Thomas S.; Schill, S. R.; Carrington, C. M. Sean
3. Puerto Rico, Vieques and Culebra land cover and forest formations circa 2000
- Author(s):
- Kennaway, Todd A.; Helmer, Eileen H.
4. Virgin Islands land cover and forest structure
- Author(s):
- Kennaway, Todd A.; Helmer, Eileen H.; Lefsky, Michael A.; Brandeis, Tom J.; Sherrill, Kirk R.
5. Historical woodland density of the conterminous United States, 1873
- Author(s):
- Liknes, Greg C.; Nelson, Mark D.; Kaisershot, Daniel J.