NASA NTRS · 19670052260
Secular changes and dark-area regeneration on Mars.
Abstract
Martian secular changes and dark area regeneration attributed to movement of sand, dust and wind caused by elevation and slope differences
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Pollack, J. B., Sagan, C.. 1967-05-01. Secular changes and dark-area regeneration on Mars.. https://ntrs.nasa.gov/citations/19670052260
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