Hydrolog i ekolog amerykański.

Forest hydrology and ecology at Coweeta / ed. Wayne T. Swank, D. A. Crossley, Jr. - New York, 1988. (Southeastern Forest Experiment Station Coweeta Hydrologic Laboratory, Otto, NC)

http://www.srs.fs.usda.gov/staff/viewemployee.jsp?index=581

http://sparc.ecology.uga.edu/webdocs/1/html/ronwswank.html