Spatial databases for the geology of the northern Rocky Mountains — Idaho, Montana, and Washington - Zientek, Michael; Derkey, Pamela D.; Miller, Robert; Causey, J.; Bookstrom, Arthur; Carlson, Mary; Green, Gregory; Frost, Thomas; Boleneus, David; Evans, Karl; Van Gosen, Bradley; Wilson, Anna; et al. (Open-File Report, 2005)