Balkowiski, C.S.

Richter, C. & Balkowiski, C.S., 1979. Water treatment plant for small communities : studies in a pilot plant, Curitiba, Brazil: Companhia de Saneamento do Parana (Sanepar). Available at: https://www.ircwash.org/sites/default/files/250-79WA-2846.pdf.