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    • Ground-water levels in Illinois through 1961

    • Natural resources and the environment: Water resources: Groundwater
    • Systematic measurements of ground-water levels in Illinois were started in the early 1930s in the Chicago region. Measurements were made in 1961 in 220 observation wells in 42 counties throughout the state. In areas remote from pumping centers, no...
    • Ground-water levels in Illinois through 1961

    • 1963; Groundwater; ISWS RI-45; Russell, Robert R.; Water levels; Wells
    • Systematic measurements of ground-water levels in Illinois were started in the early 1930s in the Chicago region. Measurements were made in 1961 in 220 observation wells in 42 counties throughout the state. In areas remote from pumping centers, no...

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