Riggs, M.S.

Bouwer, H. e.a., 1972. Renovating secondary sewage by ground water recharge with inflitration basins, (Water pollution control research series no. 16060DRV) Washington, DC, USA: US Environmental Protection Agency (EPA). Available at: https://nl.ircwash.org/sites/default/files/351.3-72RE-9234.pdf.