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HydroSource. (April 1, 2020). Ranking of the oldest hydroelectric power facilities in the United States as of 2020, by year of first operation [Graph]. In Statista. Retrieved January 25, 2021, from https://www.statista.com/statistics/783966/oldest-us-hydropower-plants/
HydroSource. "Ranking of the oldest hydroelectric power facilities in the United States as of 2020, by year of first operation." Chart. April 1, 2020. Statista. Accessed January 25, 2021. https://www.statista.com/statistics/783966/oldest-us-hydropower-plants/
HydroSource. (2020). Ranking of the oldest hydroelectric power facilities in the United States as of 2020, by year of first operation. Statista. Statista Inc.. Accessed: January 25, 2021. https://www.statista.com/statistics/783966/oldest-us-hydropower-plants/
HydroSource. "Ranking of The Oldest Hydroelectric Power Facilities in The United States as of 2020, by Year of First Operation." Statista, Statista Inc., 1 Apr 2020, https://www.statista.com/statistics/783966/oldest-us-hydropower-plants/
HydroSource, Ranking of the oldest hydroelectric power facilities in the United States as of 2020, by year of first operation Statista, https://www.statista.com/statistics/783966/oldest-us-hydropower-plants/ (last visited January 25, 2021)
