?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Harrison&rft.au=Harrison%2C+SK&rft.aufirst=SK&rft.pages=142+-+163&rft.issn=0032-0633&rft.atitle=A+branching%2C+positive+relief+network+in+the+middle+member+of+the+Medusae+Fossae+Formation%2C+equatorial+Mars%E2%80%94Evidence+for+sapping%3F&rft.title=Planetary+and+Space+Science&rft.date=September+2013&rft.volume=85&rft.genre=article