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68 pp. Maps, tables, charts, figures, illus. Published November, 2007. Captured December 12, 2008.
120 pp. Bookmarks supplied by UO. Map, tables, figures, illus. Published December, 2004. Captured December 9, 2008.
68 pp. Bookmarks modified by UO. Maps, figures, illus., appendices.
48 pp.Bookmarks supplied by UO. Maps, figures, tables, illus. Published September 18, 2006. Captured December 12, 2008.