Cite
MLA (8th Edition)
Geologic Map of Morrill County, Nebraska. U.S. Geological Survey Information Services distributor., The Survey, 1995.
APA (7th Edition)
Geologic map of Morrill County, Nebraska. (1995). U.S. Geological Survey Information Services distributor., The Survey.
Chicago (17th Edition)
“Geologic Map of Morrill County, Nebraska.” Denver, CO: U.S. Geological Survey Information Services distributor., The Survey, 1995.