1. Geologic map of Mars;Carr,1978
2. Some Martian volcanic features as viewed from the Viking orbiters;Carr;J. Geophys. Res.,1977
3. Early history of the Earth;Elsasser,1963
4. Nepenthes Mensae;Hiller,1978
5. Mutch, T. A., , R. A., Arvidson, , J. W., Head, , K. L., Jones, , R. S., Saunders, , The Geology of Mars, Princeton University Press, Princeton, N.J., 1976,