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Kocifaj, M., Aubé, M., & Kohút, I. (2010). The effect of spatial and spectral heterogeneity of ground-based light sources on night-sky radiances: Light pollution for heterogeneous sources. Monthly Notices of the Royal Astronomical Society, 409(3), 1203–1212.
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Krisciunas, K., Bogglio, H., Sanhueza, P., & Smith, M. G. (2010). Light Pollution At High Zenith Angles, As Measured at Cerro Tololo Inter-American Observatory1. Publ Astron Soc Pac, 122(889), 373–377.
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Luginbuhl, C. B., Duriscoe, D. M., Moore, C. W., Richman, A., Lockwood, G. W., & Davis, D. R. (2009). From the Ground Up II: Sky Glow and Near-Ground Artificial Light Propagation in Flagstaff, Arizona. Publ Astron Soc Pac, 121(876), 204–212.
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Vázquez-Mata, J. A., Hernández-Toledo, H. M., Martínez-Vázquez, L. A., & Pani-Cielo, A. (2009). Light pollution around Tonantzintla Observatory. Proc. IAU, 5(S260).
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Massey, P., & Foltz, C. Â.  B. (2000). The Spectrum of the Night Sky over Mount Hopkins and Kitt Peak: Changes after a Decade1. Publ Astron Soc Pac, 112(770), 566–573.
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