Sperling, M. von

Campos, H.M. & von Sperling, M., 1996. Estimation of domestic wastewater characteristics in a developing country based on socio-economic variables. , pp.p. 71-77 : 5 fig., 4 tab. Available at: https://www.ircwash.org/sites/default/files/341.0-96ES-15649.PDF.