Zones rurales dont l’altitude est < à 5 m (km2) - Liberia
Center for International Earth Science Information Network ( CIESIN )/Université Columbia. 2013. Urban-Rural Population and Land Area Estimates Version 2, Palisades, New York : NASA Socioeconomic Data and Applications Center ( SEDAC ). sedac.ciesin.columbia.edu/data/set/lecz-urban-rural-population-land-area-estimates-v2.
