Publicaciónes
- '40 green world actions' by Cristian Fenger. ISBN: 978-2-9700470-2-5
- Ideas to scale up rural water supply (2014) - H. Holtslag
- Rope pumps for Irrigation (2014) - H. Holtslag
- Tube bailer. A low cost option to make Tube wells (2014) - H. Holtslag
- Upgrading Hand dug wells (2014) - H. Holtslag
- The Rope pump, 40 years of experience (2013) - H. Holtslag
- A multi sectoral approach to sustainable rural water supply in Nicaragua: the role of the rope handpump (2013) - J.H. Alberts & J.J. van der Zee Sustainable Rural water supply. Can Nicaragua become an example? (2013) - J. de Jongh & H. Holtslag
- Transcripcion de la presentacion del informe de evaluacion de la bomba de mecate en Nicaragua (1995) - IRC
- Dissemination of the Nicaraguan rope wind pump technology to developing countries: final report on evaluation & transfer of technology (1999) - IRC
- Evaluation report Nicaraguan experiences with rope pump: final report (1995) - IRC
- Informe de evaluacion de las experiencias Nicaraguenses con la bomba de mecate: informe final (1995) - IRC
- 'Frequently Asked Questions about Ropepumps' (2013) - H. Holtslag
- Poster 'Smart tecs, new options to reduce costs of rural water supply' - H. Holtslag & W. Mgina
- 'New Smart technologies for rural water supply WASH conference Mombasa (2007)' - H. Holtslag
- 'Presentation on Rope pumps, WASH conference Mombasa (2007)' - Practica
- 'Smart water solutions.' - By NWP (Netherlands Water Partnership)
- 'Low-cost pumps for communal or domestic use and irrigation.' - H. Holtslag
- 'Rope pumps, occupying a niche.' - F. van Steenbergen
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