Dear All I am PhD student and working on spatial variation of inert gases (radon, helium) in soil gas as a tool to delineate some active/burried faults in North West Himalayas, India.It would be of great help if someone can send me literature on above said field or suggest me some software that I can use for data analysis and generating geological maps of study area. Regards Sandeep Mahajan Research Fellow (PhD student) Seismotectonic & Health Risk Assessment Lab Department of Physics Guru Nanak Dev University Amritasr. India +91-9814812857 -- Sandeep Mahajan Research Fellow Seismotectonic & Health Risk Assessment Lab Department of Physics Guru Nanak Dev University Amritasr. INDIA +91-9814812857