Geologic maps of the Olympus Mons region of Mars / U.S. Department of the Interior, U.S. Geological Survey ; by Elliot C. Morris and Kenneth L. Tanaka ; prepared for the National Aeronautics and Space Administration
Miscellaneous investigations series ; map I-2327 Atlas of Mars, 1:2,000,000 geologic series Atlas of Mars. 1:1,000,000 geologic series Geological Survey (U.S.). Atlas of Mars. 1:2,000,000 geologic series. Geological Survey (U.S.). Atlas of Mars. 1:1,000,000 geologic series. Miscellaneous investigations series (Geological Survey (U.S.)) ; map I-2327.