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KOSIS. (June 7, 2021). Length of expressways in South Korea from 1999 to 2020 (in kilometers) [Graph]. In Statista. Retrieved October 16, 2021, from https://www.statista.com/statistics/712507/south-korea-expressway-infrastructure/
KOSIS. "Length of expressways in South Korea from 1999 to 2020 (in kilometers)." Chart. June 7, 2021. Statista. Accessed October 16, 2021. https://www.statista.com/statistics/712507/south-korea-expressway-infrastructure/
KOSIS. (2021). Length of expressways in South Korea from 1999 to 2020 (in kilometers). Statista. Statista Inc.. Accessed: October 16, 2021. https://www.statista.com/statistics/712507/south-korea-expressway-infrastructure/
KOSIS. "Length of Expressways in South Korea from 1999 to 2020 (in Kilometers)." Statista, Statista Inc., 7 Jun 2021, https://www.statista.com/statistics/712507/south-korea-expressway-infrastructure/
KOSIS, Length of expressways in South Korea from 1999 to 2020 (in kilometers) Statista, https://www.statista.com/statistics/712507/south-korea-expressway-infrastructure/ (last visited October 16, 2021)
