F. R. France. Mi Paris,
«Evaluation des quantites d'eau necessaires aux irrigations». France, Ministere de la Cooperation, Paris, France, p. 204 p.: fig., tab., 1979.
R. Prasad,
«Report on rainwater harvesting in India and Middle East». Indian Institute of Science, Department of Civil Engineering, Bangalore, India, p. 80 p. + annex : drwngs., fig., maps, 1979.
P. Warshall, Weinberger, J. T., y Hewlett, G.,
Septic tank practices, Rev. and expanded. Garden City, NY, USA: Anchor Press/Doubleday, 1979, p. 177 p.