Não informado. (1944). Ionospheric data. U.S. Department of Commerce, National Bureau of Standards, Central Radio Propagation Laboratory.
Chicago Style (17. basım) AtıfNão informado. Ionospheric Data. Washington: U.S. Department of Commerce, National Bureau of Standards, Central Radio Propagation Laboratory, 1944.
MLA (8th ed.) AtıfNão informado. Ionospheric Data. U.S. Department of Commerce, National Bureau of Standards, Central Radio Propagation Laboratory, 1944.
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