Columbia subject headings:
Harvard subject headings:
Imaging systems in astronomy--Charts, diagrams, etc.
Mars (Planet)--Exploration--Charts, diagrams, etc.
Mars (Planet)--Surface--Photographs from space.
Viking Mars Program.
Princeton subject headings:
Imaging systems in astronomy--Charts, diagrams, etc.
Mars (Planet)--Exploration--Charts, diagrams, etc.
Mars (Planet)--Surface--Photographs from space.
Viking Mars Program (U.S.)