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2. Kazumura Cave Atlas;Allred,1997
3. Kazumura Cave Atlas, Island of Hawai ‘I;Allred,2002
4. 3D morphometry of valley networks on Mars from HRSC/MEX DEMs: implications for climatic evolution through time;Ansan;J. Geophys. Res.,2013
5. The Undara lava tube system, North Queensland, Australia: Updated data and notes on mode of formation and possible lunar analogue;Atkinson,1991