1. El problema de abastecimiento de agua y de eliminación de residuos;Rovani,1982
2. Progress in the attainment of the goals of the international drinking water supply and sanitation decades,1985
3. The Choice is Clear;Banik,1975
4. Solar Distillation;Malik,1984
5. Fresh water from the sun, family-sized solar still technology: a review and analysis;Dunham,1978