The Online Books Page

Books by Gregory C. Johnson:

Books in the extended shelves:

• Johnson, Gregory C.: Environmental setting and water-quality issues of the Mobile River basin, Alabama, Georgia, Mississippi, and Tennessee (U.S. Dept. of the Interior, U.S. Geological Survey ;, 2002), also by Geological Survey (U.S.) and National Water-Quality Assessment Program (U.S.) (page images at HathiTrust)
• Johnson, Gregory C.: Shallow ground water quality adjacent to burley tobacco fields in northeastern Tennessee and southwestern Virginia, Spring 1997 (U.S. Dept. of the Interior, U.S. Geological Survey ;, 2001), also by Joseph F. Connell, Geological Survey (U.S.), and National Water-Quality Assessment Program (U.S.) (page images at HathiTrust)
• Johnson, Gregory C.: Water quality of springs in the Valley and Ridge Physiographic Province in the upper Tennessee River basin, 1997 (U.S. Dept. of the Interior, U.S. Geological Survey ;, 2002), also by Geological Survey (U.S.) and National Water-Quality Assessment Program (U.S.) (page images at HathiTrust)

Find more by Gregory C. Johnson at your library, or elsewhere.