the 'sung' and 'unsung' basis for ethnic grievance Egwaikhide, Festus O. creator Isumonah, Victor A. Ayodele, Olumide S. text Dakar Council for the Development of Social Science Research in Africa c2009 monographic vi, 116 pages : Illustrations ; Includes index. Revenue sharing - Nigeria Petroleum industry and trade - Nigeria Nigeria - economic conditions Nigeria - ethnic relations HJ 1501 EGW 9782869782594