Book digitized by Google from the library of the University of Michigan and uploaded to the Internet Archive by user tpb. Chemical abstracts The Mar. and May numbers of v. 97, 1930, combined in one issue, compromise 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 designe
...d as "supplément à la Revue des questions scientifique, mars-mai 1930." The volumes are numbered both consecutively and by series: t. [1]-30, 1-15. année, 1877-91; t. 31-50 (2 sér. t. 1-20) 16-25. année, 1892-1901; t. 51-80 (3. sér. t. 1-30) 26-40. année, 1902-21; t. 81-110 (4. sér. t. 1-30) 41- année, 1922-36; v. 111-137 called also 5. sér. t. 1-27 Vols. for 1947-
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