citation
Wichelns, D.; Drechsel, Pay; Qadir, M. 2015. Wastewater: economic asset in an urbanizing world. In Drechsel, Pay; Qadir, Manzoor; Wichelns, D. (Eds.). Wastewater: economic asset in an urbanizing world. Dordrecht, Netherlands: Springer. pp.3-14.
