Bulletin mensuel de la Chambre de commerce et d'industrie du Centre, La Louvière
03/1929 07/1930 06/1932 06/1933 10/1951 03/1955 07/1955 10/1955 04/1956 03/1967 05/1967 07/1973-08/1973 08/1974-09/1974 10/1974 12/1974 03/1975-04/1975 05/1975-06/1975 03/1981-04/1981 07/1981-08/1981 1986 1992 1993 1996