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- Gravity Study Through the Tualatin Mountains, Oregon: Understanding Crustal Structure and Earthquake Hazards in the Portland Urban Area by Richard J
- USGS Scientific Investigations Map 3144
- Washington County, Oregon
- Lower Tualatin Watershed Analysis 2001
- Washington County, Oregon
- Section 2: Community Profile Washington County Natural Hazard Mitigation Action Plan Update 2010
- Portland, Oregon, Geology by Tram, Train, and Foot by Ian P
- Geochemistry, Stratigraphy and Provenance of the Portland Hills Silt in the Tualatin Mountains, Portland, Oregon
- Tectonic Evolution of the Tualatin Basin, Northwest Oregon, As Revealed by Inversion of Gravity Data
- Active Transportation and Transit
- Mr. Mike Mcbride 401 N Dixon Street Portland, Oregon Via Email
- Washington County's Five-Member Governing Board, Andy Duyck Represents the Entire County
- Contributions to Tualatin Ethnography: Subsistence and Ethnobiology
- Geology of Portland, Oregon and Adjacent Areas
- Forest Park Desired Future Condition January 2011 Forest Park Desired Future Condition January 2011
- Plate 1975, 148 P, 16 Pl, 1:62,500 Washington, Ed
- Habitat Management & Trail Plan