TY  - RPRT
TI  - Controlled photomosaic of the MTM 20257 Quadrangle, Tyrrhena Patera region of Mars
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1991
DO  - 10.3133/i2223
UR  - https://pubs.usgs.gov/publication/i2223
ID  - i2223
ER  -