Friedel, M., 1999, Ground-water risk assessment –
Friedel, M., 1999, VST2D – Variably saturated water-heat-solute transport model. U.S. Geological Survey - Unsaturated Zone Interest Group, Menlo Park, CA, Jan. 13, 1999.
Friedel, M., 2001, Salinity overview of water resources in the South Platte River Basin, A Colorado Salinity/Selenium Symposium and Workshop, Soil Water Conservation Society, Colorado Springs, CO, October 4, 2001.
Friedel, M., 2002, Coupled ground-water model calibration and predictive analysis - space age technology or science fiction?
Friedel, M., 2002, Transport model parameter nonuniqueness and its effect on recharge prediction in a coupled variably saturated ground-water system. U.S. Geological Survey artificial recharge workshop,
Friedel, M., 2002, Drought effects on water quantity and quality. U.S. Geological Survey drought workshop,
Friedel, M., 2002, Drought effects on water quantity and quality. U.S. Geological Survey drought workshop,