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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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Croft, T. A. (1973). Burning Waste Gas in Oil Fields. Nature, 245(5425), 375–376.
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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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Riegel, K. W. (1973). Light Pollution: Outdoor lighting is a growing threat to astronomy. Science, 179(4080), 1285–1291.
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Roach, F. E., & Gordon, J. L. (1973). The Light of the Night Sky. Dordrecht, Holland: Reidel Publishing Company.
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