Morgan, P. R. (1982). Ventilated improved pit latrines: Recent developments in Zimbabwe. Technology Advisory Group, World Bank.
Chicago-viite (17. p.)Morgan, Peter R. Ventilated Improved Pit Latrines: Recent Developments in Zimbabwe. Washington: Technology Advisory Group, World Bank, 1982.
MLA-viite (9. p.)Morgan, Peter R. Ventilated Improved Pit Latrines: Recent Developments in Zimbabwe. Technology Advisory Group, World Bank, 1982.
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