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REFERENCE_KEY_ID       = "MOOREETAL1987"
REFERENCE_DESC         = "Moore, H.J., R.E. Hutton, G.D. Clow, and
C.R. Spitzer, Physical properties of the surface materials at the
Viking landings sites on Mars, USGS Professional Paper 1389, 1987."
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OBJECT                 = REFERENCE
REFERENCE_KEY_ID       = "SNYDER1977"
REFERENCE_DESC         = "Snyder, C.W., 'The Missions of the Viking
Orbiters', Journal of Geophysical Research, vol. 82, p. 3971, 1977."
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OBJECT                 = REFERENCE
REFERENCE_KEY_ID       = "SNYDER1979"
REFERENCE_DESC         = "Snyder, C.W., 'The Extended Mission of
Viking', Journal of Geophysical Research, vol. 84, p. 7917, 1979."
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OBJECT                 = REFERENCE
REFERENCE_KEY_ID       = "SNYDER&MOROZ1992"
REFERENCE_DESC         = "Snyder, C.W., and I.V. Moroz, Spacecraft
Exploration of Mars, in Mars, Kieffer et al., eds., Univ. of Arizona
Press, Tucson, 1992."
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OBJECT                 = REFERENCE
REFERENCE_KEY_ID       = "SOFFEN1977"
REFERENCE_DESC         = "Soffen, G.A., 'The Viking Project', Journal
of Geophysical Research, vol. 82, p. 3959, 1977."
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OBJECT                 = REFERENCE
REFERENCE_KEY_ID       = "TOULMINETAL1977"
REFERENCE_DESC         = "Toulmin, P., A.K. Baird, B.C. Clark, K.
Keil, H.J. Rose, R.P. Christian, P.H. Evans, and W.C. Kelliher,
Geochemical and Mineralogical Interpretation of the Viking Inorganic
Chemical Results, J. Geophys. Res., 82, 4625-4634, 1977."
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OBJECT                 = REFERENCE
REFERENCE_KEY_ID       = "YODER&STANDISH1997"
REFERENCE_DESC         = "Yoder, C.F., and E.M. Standish, Martian
Precession and Rotation from Viking Lander Range Data, J. Geophys.
Res., 102, 4065-4080, 1997."
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