TY  - RPRT
TI  - Shaded relief map of the Cydonia region of Mars
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1975
DO  - 10.3133/i946
UR  - https://pubs.usgs.gov/publication/i946
ID  - i946
ER  -