1. Agricultural Extension in Developing Countries;Adams,1982
2. Desalinización por ósmosis inversa: la alternativa fotovoltaica;Andújar;ERA SOLAR,1992
3. Electrificación fotovoltaica versus electrificación convencional;Ariza,1994
4. Measuring the costs and benefits of new technology: a framework for photovoltaics;Awerbuch,1991
5. The self sufficient solar house electric concept;Bopp,1991