TY  - RPRT
TI  - High resolution Mariner 9 pictures in the Cydonia region of Mars
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1976
DO  - 10.3133/i990
UR  - https://pubs.usgs.gov/publication/i990
ID  - i990
ER  -