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- 17:39, 6 April 2016 Low-Tech, High-Thinking talk contribs uploaded File:OHorizons BioSand Filter Project in Mali.jpg
- 17:37, 6 April 2016 Low-Tech, High-Thinking talk contribs uploaded File:Wood Mold Construction Bangladesh.jpg
- 17:00, 6 April 2016 Low-Tech, High-Thinking talk contribs uploaded File:Startup Cost Reduction.png
- 16:58, 6 April 2016 Low-Tech, High-Thinking talk contribs uploaded File:Wood mold production.jpg
- 16:15, 6 April 2016 Low-Tech, High-Thinking talk contribs uploaded File:OHorizons Wood Mold Contruction Ecuador.jpg
- 16:13, 6 April 2016 Low-Tech, High-Thinking talk contribs uploaded File:Bangladeshi Women with OHorizons BSF.JPG
- 16:12, 6 April 2016 Low-Tech, High-Thinking talk contribs uploaded File:Bangladesh biosand filter clean water.jpg
- 16:10, 6 April 2016 Low-Tech, High-Thinking talk contribs uploaded File:Parts of a Concrete BioSand Filter.jpg
- 16:08, 6 April 2016 Low-Tech, High-Thinking talk contribs uploaded File:OHorizons Wood Mold.jpg
- 14:48, 6 April 2016 User account Low-Tech, High-Thinking talk contribs was created