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Author/Creator
- Geological Survey (U.S.)5,805
- Geological Survey (U.S.), issuing body1,675
- United States. Environmental Protection Agency116
- U.S. Fish and Wildlife Service111
- United States. Bureau of Reclamation100
- United States. National Park Service96
- United States. Army. Corps of Engineers93
- United States. Department of Energy. Nevada Operations Office91
- United States. Bureau of Land Management85
- United States. Department of Energy78
- National Water-Quality Assessment Program (U.S.)52
- Bullock, John H.42
- Nakata, Jennifer S.39
- Indiana. Dept. of Transportation37
- Hawaiian Volcano Observatory35
- United States. Federal Aviation Administration32
- Wright, Thomas L. (Thomas Llewellyn), 1935-32
- Robinson, Bret A.30
- Poppe, Lawrence J.28
- United States. Bureau of Indian Affairs28