Wilson, F. H., Mohadjer, S., & Grey, D. M. (2006). Preliminary integrated geologic map databases for the United States (Version 1.0.). U.S. Dept. of the Interior, U.S. Geological Survey.
Chicago Style (17th ed.) CitationWilson, Frederic H., Solmaz Mohadjer, and Delenora M. Grey. Preliminary Integrated Geologic Map Databases for the United States. Version 1.0. [Anchorage, Alaska]: U.S. Dept. of the Interior, U.S. Geological Survey, 2006.
MLA (9th ed.) CitationWilson, Frederic H., et al. Preliminary Integrated Geologic Map Databases for the United States. Version 1.0. U.S. Dept. of the Interior, U.S. Geological Survey, 2006.
Warning: These citations may not always be 100% accurate.