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Energy & Strategy Group. (January 30, 2019). Distribution of population served by wastewater treatment plants in Italy as of 2018, by type and geographic area [Graph]. In Statista. Retrieved January 19, 2021, from https://www.statista.com/statistics/978941/wastewater-treatment-plants-by-population-served-and-area-in-italy/
Energy & Strategy Group. "Distribution of population served by wastewater treatment plants in Italy as of 2018, by type and geographic area." Chart. January 30, 2019. Statista. Accessed January 19, 2021. https://www.statista.com/statistics/978941/wastewater-treatment-plants-by-population-served-and-area-in-italy/
Energy & Strategy Group. (2019). Distribution of population served by wastewater treatment plants in Italy as of 2018, by type and geographic area. Statista. Statista Inc.. Accessed: January 19, 2021. https://www.statista.com/statistics/978941/wastewater-treatment-plants-by-population-served-and-area-in-italy/
Energy & Strategy Group. "Distribution of Population Served by Wastewater Treatment Plants in Italy as of 2018, by Type and Geographic Area." Statista, Statista Inc., 30 Jan 2019, https://www.statista.com/statistics/978941/wastewater-treatment-plants-by-population-served-and-area-in-italy/
Energy & Strategy Group, Distribution of population served by wastewater treatment plants in Italy as of 2018, by type and geographic area Statista, https://www.statista.com/statistics/978941/wastewater-treatment-plants-by-population-served-and-area-in-italy/ (last visited January 19, 2021)
