For Further Information

Belton, M. J. S.; and Hunten, D. M.: The Abundance and Temperature of C02 in the Martian Atmosphere. Astrophys. J., vol. 145, 1966.

Chamberlain, J. W.; and Hunten, D. M.: Pressure and COz Content of the Martian Atmosphere—A Critical Discussion. Rev. Geophys., vol. 3, 1965, p. 299.

Fjeldbo, G.; Fjeldbo, W. C.; and Eshleman, V. R.: Atmosphere of Mars: Mariner IV Models Compared. Science, vol. 153, 1966, p. 1518.

Kaplan, L. D.; Münch, G.; and Spinrad, H.: An Analysis of the Spectrum of Mars. Astrophys. J., vol. 139, 1964, p. 1.

Kellogg, W. W.; and Sagan, C.: The Atmospheres of Mars and Venus. Nat. Acad. Sci.-Nat. Res. Council Publ. 944, 1961.

McElroy, M. B.: The Upper Atmosphere of Mars. Astrophys. J., vol. 150, 1967, p. 1125.

Michaux, C. M.: Handbook of the Physical Properties of the Planet Mars. NASA SP-3030, 1967.

Moroz, V. I.: Physics of Planets. Ch. II, NASA TT F-515, 1968.

Öpik, J. E.: Atmosphere and Surface Properties of Mars and Venus. Prog. Astronaut. Sei., vol. 1, 1962, p. 261.

Owen, T. A.: The Composition and Surface Pressure of the Martian Atmosphere: Results from the 1965 Opposition. Astrophys. J., vol. 146, 1966, p. 257.

Sagan, C.; Hanst, P. L.; and Young, A. T.: Nitrogen Oxides on Mars. Planetary and Space Sei., vol. 13, 1965, p. 73.

Sagan, C.; and Veverka, J.: Martian Ionosphere: A Component Due to Solar Protons. Science, vol. 158, 1967, p. 110.

Schorn, R. A.; et al.: High-Dispersion Spectroscopic Observations of Mars: II, The Water-Vapor Variations. Astrophys. J., vol. 147, 1967.

Slipher, E. C.: The Photographic Story of Mars. Sky Publishing Corp., 1962.

Spinrad, H.; et al.: High-Dispersion Spectroscopic Observations of Mars: I, The CO2 Content and Surface Pressure. Astrophys. J., vol. 146, 1966, p. 331.

Vaucouleurs, G. de: Physics of the Planet Mars. Faber & Faber, 1954.

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