M.W. Bowen, Johnson, W.C., Egbert, S.L., and Klopfenstein, S.T. 2010. A GIS-based approach to identify and map playa wetlands on the High Plains, Kansas, USA. Wetlands, 30:4, 675-684.
M.W. Bowen, Johnson, W.C., Klopfenstein, S.T., and Dunham, J.W. 2009. Developing a geospatial database of playas in the High Plains of Kansas. Current Research in the Pleistocene, 26, 191-193.
Maps: R.S. Sawin and West, R.R. 2010. Surficial geology of Geary County, Kansas: Kansas Geological Survey, Map M-122.
W.C. Johnson and Arbogast, A.F.  2010. Surficial geology of Finney County, Kansas; Playa deposits and Arkansas River terrace by W.C. Johnson and T.L. Woodburn: Kansas Geological Survey, Map
W.C. Johnson and Woodburn, T.L. 2009. Surficial geology of Ford County, Kansas: Kasnas Geological Survey, Map M-108.
Presentation: S.T. Klopfenstein, Johnson, W.C., Woodburn, T.L., and Dunham, J.W. 2010. A new geologic map of Ford County, Kansas. Great Plains-Rocky Mountains Division Association of American Geographers, Lawrence, Kansas.
Soil carbon patterns in grasslands.
Playa distribution mapping.
Various geospatial applications.