- 1. Help2HelpYourSelf: Biogas für Äthopien
- (DropInTheOcean)
- https://www.swr.de/landesschau-rp/biogasprojekt-einer-westerwaelderin-ein-rucksack-voller-innovation/-/id=122144/did=15747906/nid=122144/1r040el/index.html
- Created on 07 August 2018
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