Maps of other worlds
Drawings by Don Davis. Middle Imbrian End of Imbrian 3.3 Ga Today
Schematic paleomaps of the eastern hemisphere of Mars. Mutch et al. 1976, p. 317 Mutch, T. A. & Saunders, R. S.: The geologic development of Mars – A review. Space Science Reviews, vol. 19, June 1976, p. 3-57.