1. Photovoltaic vs diesel: a grounded cost study of water pumping options in Botswana;Danley,1986
2. Solar power for telecommunication;Holdreness,1979
3. Design and field test of PV water pumping systems;Mahmoud,1992
4. The economics of a mechanical wind pumping system;Samara,1993
5. PV in paradise … the Philippines rural photovoltaic electrification scheme;Santibanez-Yeneza,1992