[1] Silverman S. M. (U.S. Air Force Cambridge Research Laboratories), Tuan T. F. (Physics Department, University of Cincinnati, Ohio), "Auroral Audibility," Adv. Geophysics, 16, pp. 155-266, 1973.
[2] Wilson C. R. (Goephysical Institute, University of Alaska), "Auroral Infrasonic Waves," J. Geophysical Research, 74, No. 7, 1969.
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