@book {329,
	title = {Herpetofauna of West Africa},
	volume = {I},
	year = {2000},
	publisher = {Chiaira},
	organization = {Chiaira},
	address = {Frankfurt, Germany},
	author = {R{\"o}del, Mark-Oliver}
}
@book {1091,
	title = {Herpetofauna of West Africa},
	volume = {Vol. I Amphibians of the West African Savanna},
	year = {2000},
	publisher = {Edition Chimaira},
	organization = {Edition Chimaira},
	address = {Frankfurt am Main},
	author = {R{\"o}del, Mark-Oliver}
}
@article {2630,
	title = {Niger River},
	journal = {ed. M.McGinley. Encyclopedia of Earth. National Council for Science and the Environment. Washington DC},
	year = {2013},
	url = {http://www.eoearth.org/article/Niger_River?topic=78166},
	author = {Hogan, C.M.}
}
