@book {61864,
	title = {La qualit{\'e} chimique des eaux souterraines de la nappe du mio-pliocene d\&rsquo;El Outaya ( Biskra )},
	year = {2003},
	month = {2003},
	author = {Nafaa, Brinis and Larbi, Djabri and Ramdane, Kardache}
}
