TY  - RPRT
TI  - Controlled mosaic of the Yorktown region of Mars (Viking 1 landing site)
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1977
DO  - 10.3133/i1059
UR  - https://pubs.usgs.gov/publication/i1059
ID  - i1059
ER  -