"Contour interval 1000 meters"
Coordinates shown as: (W 225⁰--E 202.5⁰/N 15⁰--S 0⁰).
"Prepared on behalf of the Planetary Geology Program, Solar System Exploration Division, Office of Space Science, National Aeronautics and Space Administration, under contract W-15,814."
Includes text, bibliographical references, and index maps.