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Energy & Strategy Group. (January 30, 2019). Distribution of wastewater treatment plants in Italy as of 2018, by type [Graph]. In Statista. Retrieved January 25, 2021, from https://www.statista.com/statistics/978872/distribution-of-wastewater-treatment-plants-by-type-in-italy/
Energy & Strategy Group. "Distribution of wastewater treatment plants in Italy as of 2018, by type." Chart. January 30, 2019. Statista. Accessed January 25, 2021. https://www.statista.com/statistics/978872/distribution-of-wastewater-treatment-plants-by-type-in-italy/
Energy & Strategy Group. (2019). Distribution of wastewater treatment plants in Italy as of 2018, by type. Statista. Statista Inc.. Accessed: January 25, 2021. https://www.statista.com/statistics/978872/distribution-of-wastewater-treatment-plants-by-type-in-italy/
Energy & Strategy Group. "Distribution of Wastewater Treatment Plants in Italy as of 2018, by Type." Statista, Statista Inc., 30 Jan 2019, https://www.statista.com/statistics/978872/distribution-of-wastewater-treatment-plants-by-type-in-italy/
Energy & Strategy Group, Distribution of wastewater treatment plants in Italy as of 2018, by type Statista, https://www.statista.com/statistics/978872/distribution-of-wastewater-treatment-plants-by-type-in-italy/ (last visited January 25, 2021)
