JENNESS, Jeff, DOOLEY, Joe, AGUILAR-MANJARREZ, José and RIVA, Claudia, 2007, African water resource database : GIS-based tools for inland aquatic resource management [online]. 2007. Rome : Food and Agriculture Organization of the United Nations. [Accessed 17 April 2025]. ISBN 978-92-5-105740-7. Retrieved from: ftp://ftp.fao.org/docrep/fao/010/a1170e/a1170e00.pdf