1. A preliminary study of atmospheric waves using radiosonde data
2. The air flow over a ridge — the effects of the upper boundary and high-level conditions
3. and 1961 Geof. Publ., 22, No. 3, Oslo.
4. and 1960 Monographies de la Météorologie Nationale, No. 20.
5. 1957 Report No. 5, Inst. Weather and Clim. Res., Oslo.