1. Elastic and Raman lidar temperature measurements from Poker Flat, Alaska, during February 1992;Burka,1992
2. Herzberg, G., , Spectra of Diatomic Molecules, 551-554 Van Nostrand Reinhold, New York, 1950,
3. Auroral spectroscopy;Jones;Space Sci. Rev.,1971
4. Natural sources;Kauth,1985
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