Ningnoi, T.

Ningnoi, T., 1999. Arsenic removal from groundwater by conditioned zeolite, (M.Sc. thesis D.E.W. / IHE no. 081) Delft, The Netherlands: IHE (International Institute for Infrastructural, Hydraulic and Environmental Engineering). Available at: https://www.ircwash.org/sites/default/files/250-15961.pdf.