Creator
- Geological Survey (U.S.)5
- National Atlas of the United States5
- Arndt, Raymond E.2
- Bawiec, Walter J.2
- Beikman, Helen M.2
- King, Philip B.2
- Schruben, Paul G.2
- Wade, Tim2
- Blackburn, Laura1
- Lannoo, Michael J.1
- Nanjappa, Priya1
- Patuxent Wildlife Research Center1
- Ritters, Kurt1
- United States. Agricultural Research Service1