![Subsurface structure of Planum Boreum from Mars Reconnaissance Orbiter Shallow Radar soundings]()
Subsurface structure of Planum Boreum from Mars Reconnaissance Orbiter Shallow Radar soundingsNathaniel E. Putzig; Roger J. Phillips; Bruce A. Campbell; John W. Holt; Jeffrey J. Plaut; Lynn M. Carter; Anthony F. Egan; Fabrizio Bernardini; Ali Safaeinili; Roberto Seu · 2009