1. Y. Mintz andJ. Lang:A model of the mean meridional circulation, Final Report, Article VI, Contract AF 19(122)-48,Dept. of Meteorology, University of California (Los Angeles, 1955).
2. E. O. Holopainen:Tellus,19, 1 (1967).
3. E. N. Lorenz:The Nature and Theory of the General Circulation of the Atmosphere (World Meteorological Organization, Geneve, Suisse, 1967).
4. H. L. Crutcher:Upper Wind Statistics Charts of the Northern Hemisphere, Office of the Chief of the US Naval Operations. (1959).
5. Final Report, Part 2, Contract AF 19(122)-153;H. Buch,1954