8A10.75 - Distortion Due to Refraction by Earth's Atmosphere
- Ariel Cohen and Igal Galili, "Where is the Sky?", TPT, Vol. 39, # 2, Feb. 2001, p. 92.
- Neil M. Shea and Jon Loomis, "Estimating the Effective Depth of the Atmosphere Using the Old Farmer's Almanac", TPT, Vol. 35, # 2, Feb. 1997, p. 90.
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