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50 pp. Tables, illus., appendices. Published 1999. Captured September 16, 2009.
83 pp. Bookmarks supplied by UO. Maps, tables, figures, illus., appendices. Published June, 2005. Captured September 16. 2009.
87 pp. Bookmarks supplied by UO. Maps, tables, figures, illus., appendices. Published August 13, 2003. Captured September 16, 2009.
39 pp. OCR and bookmarks supplied by UO. Map. Adopted October 1, 1980. Captured December 1, 2008.
33 pp. Maps, figures, appendices. Pblished May, 2001. Captured September 17, 2009.
40 pp. Map, figures, illus., appendices. Published December 27, 2004. Captured September 17, 2009.