2014. National Energy Information Center (U.S.). This point shapefile represents underground natural gas storage fields in the United States as of July 2014. County centroids are used for map loca... National Energy Information Center (U.S.).
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United States, Central Intelligence Agency. "504014 8-79 (543855)." Relief shown by shading and spot heights. Includes location map and comparative area map. Maps in margin: Population -- Lin... Central Intelligence Agency.
Richardson, G. B. (George Burr), 1872-1949. compiled under the direction of G.B. Richardson ; oil and gas data compiled and drawn by Lewis B. Pusey ; Department of the Interior, United States... The Survey.
Geological Survey (U.S.) and Richardson, G. B. (George Burr), 1872-1949. Department of the Interior, United States Geological Survey ; compiled under the direction of G.B. Richardson. Also shows pipelines. The Survey.