GIZ Study to Minimise the Effects of Sand and Mineral Content- Final Report by Colin | Sep 24, 2019 | Aftercare, Studies and Reports | Created OnSeptember 24, 2019Last Updated OnSeptember 24, 2019byColin You are here: Online Library Studies and Reports Aftercare GIZ Study to Minimise the Effects of Sand and Mineral Content- Final Report < BackGIZ Study to Minimise the Effects of Sand and Mineral Content- Final Report