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R. L üst andJ. A. Simpson:Phys. Rev.,108, 1563 (1957).
F. S. Jory:Phys. Rev.,103, 1068 (1956).
R. L üst:Phys. Rev.,105, 1827 (1957).
P. Meyer, E. N. Parker andJ. A. Simpson:Phys. Rev.,104, 768 (1956).
Assisted in part by the Office of Scientific Research and the Geophysics Research Directorate, Air Force Cambridge Research Center, Air Research and Development Command, U.S. Air Force.