Directory: Archiefnet (Includes Flanders).

Research guide to libraries and archives in the Low Countries, by Martha L. Brogan. NY: Greenwood Press, 1991.
LOCATION: Widener: WID-LC Z813.A1 B76 1991

Archiefbank Vlaanderen: Register van private archieven

Archives de l'État en Belgique includes lists of online and printed inventories.

Letterenhuis: House of Literature - Flemish Literature's Memory