1. and , 1953. Handbook of Statistical Methods in Meteorology, HMSO, London, p. 64.
2. and , 1964. ‘The role of the jet stream in the formation of desert depressions in the Middle East’. WMO Technical Note 64, World Meteorological Organization, Geneva.
3. 1972. An Introduction to Dynamic Meteorology, Academic Press, New York, p. 107.
4. On the use and significance of isentropic potential vorticity maps
5. 1960. Weather Forecasting for Aeronautics, Academic Press, New York, 673 pp.