1. An Aerological Study of Zonal Motion, Its Perturbations and Break-Down;Berggren;Tellus,1949
2. A Study of the Effects of Large Blocking Highs on the General Circulation in the Northern-Hemisphere Westerlies;Elliott;J. Met.,1949
3. Flohn, H. , 1949: Mittlere Druck- und Strömungsverhältnisse in der Troposphäre, Die Grosswetterlagen Mitteleuropas, Aug. 1949, Zentralamt Bad Kissingen.
4. Garriott, E. B. , 1904: Long Range Forecasts, U. S. Weather Bureau Bulletin No. 35, Wash., D.C.
5. The Trough-and-Ridge Diagram;Hovmöller;Tellus,1949