1. Foliar and soil chemistry at Harvard Forest Chronic Nitrogen Amendment Experiment 1995-2009
- Author(s):
- Minocha, Rakesh; Long, Stephanie; Turlapati, Swathi A.
2. Bailey's ecoregions and subregions of the United States, Puerto Rico, and the U.S. Virgin Islands
- Author(s):
- Bailey, Robert G.
U.S. Department of Agriculture