Black Hills - Island in the Plains (University of Wy CES, Recorded 2005) Borrow Ditches (Rights of Way) (University of Wy CES, Recorded 2005) Carbon Cycle (University of Wy CES, Recorded 2004) Clump ...

Ecology, geology, and history at Historic Trails Center (University of Wy CES, Recorded 2003) Erosion (University of Wy CES, Recorded 2004) Erosion in Wind Rivers (University of Wy CES, Recorded 2003) ...