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Petroleum refineries, including cracking plants, in the United States, January 1, 1940

Petroleum refineries, including cracking plants, in the United States, January 1, 1941

Natural-gasoline plants in the United States, January 1, 1944

Petroleum refineries, including cracking plants in the United States, January 1, 1947

Petroleum refineries, including cracking plants, in the United States, January 1, 1949


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