TY  - RPRT
TI  - Shaded relief maps of the eastern, western, and polar regions of Mars
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1985
DO  - 10.3133/i1618
UR  - https://pubs.usgs.gov/publication/i1618
ID  - i1618
ER  -