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geonames.usgs.gov/pls/gnispublic/f?p=gnispq:3:::NO::P3_FID:37458
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en.wikipedia.org/wiki/Oro_Valley,_Arizona (2 Aug 2010)
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www.ovhistory.org/ (6 Feb 2010)
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www.orovalleyaz.gov/ (1 Sep 2010)
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geonames.usgs.gov/pls/gnispublic/f?p=gnispq:3:::NO::P3_FID:2413092