TY  - RPRT
TI  - Shaded relief and surface markings of the Etana region of Ganymede
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1987
DO  - 10.3133/i1810
UR  - https://pubs.usgs.gov/publication/i1810
ID  - i1810
ER  -