BCEOM -Paris, FR, Bureau Central d'Etudes pour les Equipements d'Outre-Mer,
« Hydraulique pastorale », vol. no. 7. France, Secretariat d'Etat aux Affaires Etrangeres, Paris, France, p. 311 p. : fig., map, photogr., 1973.
IDRC -Ottawa, Ont., CA, International Development Research Centre,
« Rural water supply and sanitation, Lausanne seminar, 29 May- 1 June, 1973 : working papers no. 1, 4, 8, 11-17 ». International Development Research Centre (IDRC), Ottawa, Ont, Canada, p. Various paging, 1973.
S. Siber,
« Slow sand filtration for small communities and rural areas », vol. no. 73-02. Middle East Technical University, Faculty of Engineering, Ankara, Turkey, p. 38, 9 p.: graphs, tab., 1973.