TY  - RPRT
TI  - Shaded relief map of the Tritonis Lacus region of Mars (Viking A2 landing site)
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1977
DO  - 10.3133/i1055
UR  - https://pubs.usgs.gov/publication/i1055
ID  - i1055
ER  -