Water-pumping devices: a handbook for users and choosers/ por Fraenkel, Peter (Peter L.)

The power guide : a catalogue of small scale power equipment / por Fraenkel, Peter (Peter L.)

Food from windmills : a report on the wind mill irrigation project initiated by the American Presbyterian Mission at Omo Station in Ethiopia / por Fraenkel, Peter (Peter L.), Intermediate Technology Development Group

Water lifting devices : ba handbook for users and choosers / por Fraenkel, Peter (Peter L.), Thake, Jeremy, Food and Agriculture Organization of the United Nations, Practical Action (Organization), IT Power (Organization)