Regional variations among Titan's dunes: Belet versus Fensal dune fields Le Gall, A. ; Janssen, M. A. ; Wye, L. C. ; Radebaugh, J. ; Lorenz, R. D. ; Cassini RADAR Team Abstract Publication: European Planetary Science Congress 2010 Pub Date: September 2010 Bibcode: 2010epsc.conf..247L