![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiQaIDEGys0_T0-3hPJyxs1fIRywLkYr23aGhu9MK0BNH03WcWHIujAe3u0FbX7xne8Wzdf7ZQETKR6bdhTmWAvNYpSLlpIsL6Jggd_TBZxGytVKCCoaWfYP6ni2XEr6r4cFscJW5dl1XYb/s400/Ogallala_changes_in_feet_1980-1995_USGS.gif)
Description: A browse image of the water-level-change contours data set for the High Plains aquifer, 1980 to 1995. Data_Set_Credit: McGuire, Virginia L. and Sharpe, Jennifer B.
Source: United States Geological Survey
Egan, Timothy. The Worst Hard Time: The Untold Story of Those Who Survived the Great American Dust Bowl. Boston: Houghton Mifflin Co, 2006.
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