The March and May numbers of v. 97, 1930, combined in one issue, comprise a special series of articles on the Belgian Congo (Le Congo Belge et les sciences) published on the occasion of the centenary of Belgian independence. A separate map (Carte administrative du Congo Belge et de ses voies de communication) accompanies this combined issue, and is designated as "supplément à la Revue des questions scientifiques, mars-mai 1930."
Issued 1927-36 in 4 series: A. Sciences mathématiques; B. Sciences physiques et naturelles; C. Sciences médicales; D. Sciences économiques; and Fascicule administratif, 1927- . Issued 1937-40 in 3 series: 1. Sciences mathématiques et physiques; 2. Sciences naturelles et médicales; 3. Sciences économiques; 1947- in 1 series: 1. Sciences mathématiques, astronomiques et physiques.
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