1990. Reed, E. C. (Eugene Clifton), 1901-. Conservation and Survey Division.
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2. Groundwater Map of Nebraska Showing Relation of Fall 1961 Readings to Median Water Level Management
1990. Reed, E. C. (Eugene Clifton), 1901-. Conservation and Survey Division.
1990. Conservation and Survey Division.
1990. Schmidt, James J. Includes location map. "Total copies printed: 500." by James J. Schmidt ; Robert L. Stewart, cartographer. Relief shown by contours and spot height... Ohio. Division of Water.
1990. Conservation and Survey Division.
1990. Conservation and Survey Division.