TY  - RPRT
TI  - Shaded relief map of the Hellas Quadrangle of Mars
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1979
DO  - 10.3133/i1169
UR  - https://pubs.usgs.gov/publication/i1169
ID  - i1169
ER  -