The Fall of Ghana: An Economic Account, pp 195-203, in: HENIGE, D. & McCASKIE, T.C. : 'West African Economic and Social History. Studies in memory of Marion Johnson.

Rimmer, Douglas.

The Fall of Ghana: An Economic Account, pp 195-203, in: HENIGE, D. & McCASKIE, T.C. : 'West African Economic and Social History. Studies in memory of Marion Johnson. - 232