city government office in Sosan

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서산시청

1 Gwanamun-gil, Eupnae-dong, 356-020 Sosan, South Korea

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Seosan City Safety Integration Center

1002-9 Nambusunhwan-ro, Seoknam-dong, 356-110 Sosan, South Korea

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서산세무서

398-10 Seonknim-dong, 356-030 Sosan, South Korea