Erie Triangle
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- Western Pennsylvania - Wikipedia, the Free Encyclopedia Western Pennsylvania Coordinates: 41.05°N 79.05°W from Wikipedia, the Free Encyclopedia
- Assessment of Grassland Ecosystem Conditions in the Southwestern United States
- 2011 High Intensity Drug Trafficking Areas Program Report
- Section Four
- The Western Pennsylvania Historical Magazine
- The Struggle Over Land Surveys in Northwestern Pennsylvania in 1794
- Jefferson Essays
- FY 2008 EDA Annual Report
- Nickel Plate in
- Pennsylvania History