TY - RPRT TI - Controlled photomosaic of the MTM 20187 Quadrangle, Orcus Patera region of Mars AU - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey PY - 1995 DO - 10.3133/i2404 UR - https://pubs.usgs.gov/publication/i2404 ID - i2404 ER -