Mate, J.

Mate, J., 1991. Why a pit latrine : a manual for extension workers and latrine builders, (Training series / IRC no. 8) S.l.: Piped Supplies for Small Communities (PSSC) Project Zambia. Available at: https://ircwash-d7.platform-3.co.uk/sites/default/files/321.4-91WH-9446.pdf.