TY - JOUR A1 - Dartnell, L. R. A1 - Desorgher, L. A1 - Ward, J. M. A1 - Coates, A. J. T1 - Martian sub-surface ionising radiation: biosignatures and geology JO - Biogeosciences Discuss. J1 - BGD VL - 4 IS - 1 SP - 455 EP - 492 Y1 - 2007/02/09 PB - Copernicus Publications SN - 1810-6277 UR - http://www.biogeosciences-discuss.net/4/455/2007/ L1 - http://www.biogeosciences-discuss.net/4/455/2007/bgd-4-455-2007.pdf ER -