Spaulding, Arthur D.; Washburn, James S., Atmospheric Radio Noise: Worldwide Levels and Other Characteristics, NASA Sti/Recon Technical Report N, NTIA Report TR-85-173 (Boulder, CO: U. S. Department of Commerce, National Telecommunications & Information Administration, Institute for Telecommunications Sciences), April 1985, 86: 13639 [2022-09-29], Bibcode:1985STIN...8613639S, (原始内容存档于2011-12-09)