- National Atlas of the United States39
- Geological Survey (U.S.)33
- Arndt, Raymond E.10
- Bawiec, Walter J.10
- Beikman, Helen M.10
- King, Philip B.10
- National Geophysical Data Center10
- Schruben, Paul G.10
- Geological Survey (U.S.) Minerals Information Team9
- California. Department of Fish and Game. Marine Resources Region3
- EROS Data Center3
- Gap Analysis Program (U.S.)3
- Godt, Jonathan W.3
- U.S. Census Bureau. Geography Division3
- Rumsey, David, 1944-2
- United States. Forest Service2
- Wade, Tim2
- Blackburn, Laura1
- Burroughs, H. N.1
- Canada Centre for Mapping1
