[Koha] How to import LC Subject Headings

Dear Friends, I am trying import subject headings from LC, http://id.loc.gov/download/ Files available in following formats, nt, rdf, ttl. Koha support marc format to import. I failed to convert above mentioned files to marc format. May I know how to import LC authority files to Koha? Regards, -- Vimal Kumar V. Technical Assistant Mahatma Gandhi University Library Kottayam, Kerala- 686 560 Web: http://www.vimalkumar.info Blogs: http://linuxhalwa.blogspot.com http://kohageek.blogspot.in http://dspacegeek.blogspot.in http://moovandan.blogspot.in <http://moovandan.blogspot.in> --------------------------------------------------------------------------- "I forget what I was taught. I only remember what I have learnt" -Patrick White