“The Spatial and Seasonal Distribution of Bulinus Truncatus, Bulinus Forskalii and Biomphalaria Pfeifferi, the Intermediate Host Snails of Schistosomiasis, in N’Djamena, Chad”. 2014. Geospatial Health 9 (1): 109-18. https://doi.org/10.4081/gh.2014.9.