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- [33] POPULATION IN RELATION TO RESOURCES IN BELGIUM AND HOLLAND SCOTTISH GEOGRAPHICAL MAGAZINE, 1938, 54 (02): : 96 - 106
- [39] Brief resume of Seiberg-Witten theory GROUP 21 - PHYSICAL APPLICATIONS AND MATHEMATICAL ASPECTS OF GEOMETRY, GROUPS, AND ALGEBRA, VOLS 1 AND 2, 1997, : 576 - 585