1.
Advertising and the Belgian post office : part 2
Advertising and the Belgian post office : part 1
Belgian postal stationery
Belgium: From the Roman Invasion to the Present Day
Belgium: the land of art; its history, legends, industry and modern expansion, by William Elliot Griffis.
Advertising and the Belgian post office : part 3
Histoire de Flandre (T. 3/4)
Histoire de Flandre (T. 1/4)