Fig. 2
From: Onchocerciasis is not a major cause of blindness in two endemic villages in Sierra Leone
Geographical locations of Mangobo and Petifu villages in Tonkolili district of Sierra Leone. World Imagery basemap source: Esri, Maxar, GeoEye, Earthstar Geographics, CNES/Arbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community