25 February 2000 | Publisher: United States Department of State | Document type: Annual Reports
30 January 1998 | Publisher: United States Department of State | Document type: Annual Reports
30 January 1997 | Publisher: United States Department of State | Document type: Annual Reports
30 January 1996 | Publisher: United States Department of State | Document type: Annual Reports
30 January 1995 | Publisher: United States Department of State | Document type: Annual Reports
30 January 1994 | Publisher: United States Department of State | Document type: Annual Reports
29 May 1990 | Publisher: Economic Community of West African States (ECOWAS) | Document type: Multilateral Treaties/Agreements
30 June 1989 | Publisher: Economic Community of West African States (ECOWAS) | Document type: Multilateral Treaties/Agreements