IER
1994, Rapport technique
IER
1994, Rapport technique
IER
1994, Rapport technique
Kanté,Salif
2010, Rapport technique
IER
1994, Rapport technique
Adams,Adrian
2000, Divers
Hilhorst,Thea and Coulibaly,Amadi
1998, Divers
Jones,Brian.T.B
1999, Divers
Olulumazo,Alinon Koffi
2000, Divers
Winter,Mike
1998, Divers