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Author/Creator
- Geological Survey (U.S.)12
- Cress, Jill J. (Jill Janene)4
- NatureServe (Program)4
- East, Joseph A.2
- Bellino, Jason C.1
- Dixon, Joann1
- Groundwater Resources Program (U.S.)1
- Kuniansky, Eve L.1
- NatureServe Canada1
- Personius, Stephen F.1
- Phelps, Geoffrey A.1
- Portland State University1
- Sayre, Roger1
- Shannon & Wilson1
- Siler, Drew L.1
- Tri-County Metropolitan Transportation District of Oregon1
- Walsh, Ken1