Original oil and gas trade magazine vintage ad for UNITED GAS CORPORATION. Main office was located in Shreveport, Louisiana. Savings you can see. Comfort you can feel the year round with Gas Air Conditioning. Before you buy, get bid on both Gas Air Conditioning and Compressor Type. United Gas, Serving the Gulf South. This unique 1967 old petroleum refining gas process industry magazine advertisement would display beautifully matted and framed.