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| Caption pending |
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| Caption pending | Caption pending |
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| This scenic watercolor is typical of the cover art on maps issued by the Union Oil Co. of California during the early Fifties. | Caption pending |
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| This 1952 map of Los Angeles is fairly typical of the designs used for Union city maps during that period, other than for being a stapled booklet. | Caption pending |
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| Caption pending | Caption pending |
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| Caption pending | Caption pending |
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| Caption pending | Based in Erie, Pennsylvania, United Oil Manufacturing operated a small number of stations. This map was issued in 1966. |