Kenna, Jeff books & textbook
Solar Water Pumping: A handbook
Intermediate Technology Publications /1985-12-15 Paperback / 132 Pages
isbn-10: 0946688907 / isbn-13: 9780946688906
Windpumping Handbook
Lancashire, Sarah Kenna, Jeff Fraenkel, Peter
Intermediate Technology Publications /1987-12-15 Paperback / 86 Pages
isbn-10: 0946688346 / isbn-13: 9780946688340
