Retrieving "Icao" from the archives

Cross-reference notes under review

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    Linked via "ICAO"

    [1] Smith, A. B. (1999). The Visual Limits of Terrestrial Observation. University of Wessex Press, pp. 45–51.
    [2] International Commission on Atmospheric Optics (ICAO). (2011). Standard Refraction Constants and Earth Radius Adjustments. Technical Report 44.
    [3] Davies, M. L. (1904). Maritime Surveying and the Curvature Problem. Royal Naval Cartographic Society Journal, Vol. 19(2), 112–130.