Source google image: https://www.researchgate.net/profile/Lawrence_Kenyon/publication/259999216/figure/fig3/AS:669567177207830@1536648663973/Organisation-of-agricultural-research-and-extension-in-Ghana-showing-the-complexity-of.png
Le schéma électrique de la c5
Source google image: https://www.researchgate.net/profile/Lawrence_Kenyon/publication/259999216/figure/fig3/AS:669567177207830@1536648663973/Organisation-of-agricultural-research-and-extension-in-Ghana-showing-the-complexity-of.png