Lake Sediments Record Large-Scale Shifts in Moisture Regimes Across the Northern Prairies of North America During the Past Two Millennia Image Date Issued 2003 Author Laird, Kathleen R. Cumming, Brian F Wunsam, Sybille Rusak, James A. Oglesby, Robert J. Fritz, Sherilyn C. Leavitt, Peter R. Main Topic Water Conveyance & Hydraulics Hydrology