1. U.S. Geological Survey ground-water Climate Response Network / [by William L. Cunningham, Linda H. Geiger, and George A. Karavitis]. Cunningham, William L. Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, [2007] Book Physical ReCAP I 19.127:2007-3003
2. Earth explorer. Sioux Falls, SD : U.S. Geological Survey, [2000] Book Physical ReCAP Map Div. 05-4639
3. The National Atlas of the United States of America. Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, [2000] Book Physical ReCAP Map Div. 05-4640
4. U.S. Geological Survey quality-assurance project for sediment analysis. Gordon, J. D. [Reston, Va. : U.S. Geological Survey, Office of Surface Water] 2000. Book Physical ReCAP JSF 01-319