Nghien, P.S.

Calvert, P. & Nghien, P.S., 2000. Appraisal of the Vinsanres eco-san toilet demonstration project 1997-2000, Hanoi, Viet Nam: Viet Nam, Ministry of Health. Available at: https://nl.ircwash.org/sites/default/files/Nghien-2000-Appraisal.pdf.