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Citations
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Bertiau, F. C., de Graeve, E., & Treanor, P. J. (1973). The Artificial Night-sky Illumination in Italy. Vatican Observatory publications, 1(4), 157–179.
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Hoag, A. A. (1973). City Sky Glow Monitoring at Kitt Peak. Publications of the Astronomical Society of the Pacific, 85(507), 503–507.
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Walker, M. F. (1973). Light Pollution in California and Arizona. Publications of the Astronomical Society of the Pacific, 85(507), 508–519.
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Walker, M. F. (1970). The California Site Survey. Publications of the Astronomical Society of the Pacific, 82, 672–698.
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Aubrecht, C., Elvidge, C. D., Ziskin, D., Longcore, T., & Rich, C. (2008). 'When the lights stay on' – A novel approach to assessing human impact on the environment. Earth. Earthzine, .
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