http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Studies of tillage-induced effects on hydraulic conductivity
Reduction of sediment and chemical transport by design tillage
Office of Water Research and Technology.
Stephan A. Schroeder, William C. Moldenhauer, and Jerry V. Mannering.
Technical report (Purdue University. Water Resources Research Center) ; no. 117