Ng'ambi, D.

Ng'ambi, D., 1991. A manual on operation and maintenance of communal standpost for extension workers and caretakers, (Training series / IRC no. 7) S.l.: Piped Supplies for Small Communities (PSSC) Project Zambia. Available at: https://es.ircwash.org/sites/default/files/262.2-91MA-9443.pdf.