Field Studies of Gullies and Pingos on Svalbard – a Martian Analog - Carlsson, Ella; Johansson, Henrik; Johnsson, Andreas; Heldmann, Jennifer; McKay, Christopher; Olvmo, Mats; Johansson, Lars; Fredriksson, S.; Schmidt, H.; McDaniel, Steve; Reiss, Dennis; Hiesinger, Harald; et al. (2008)