else:
             mt['deprecated'] = '-'
 
+    licenses = set(((b.extra_info.get('license'), b.extra_info.get('license_description'))
+        for b in Book.objects.all().iterator() if b.extra_info.get('license')))
+
     return render_to_response('reporting/main.html',
                 locals(), context_instance=RequestContext(request))
 
 
-@generated_file_view('reports/katalog.pdf', 'application/pdf', 
+@generated_file_view('reports/katalog.pdf', 'application/pdf',
         send_name=lambda: 'wolnelektury_%s.pdf' % date.today(),
         signals=[Book.published])
 def catalogue_pdf(path):
         })
 
 
-@generated_file_view('reports/katalog.csv', 'application/csv', 
+@generated_file_view('reports/katalog.csv', 'application/csv',
         send_name=lambda: 'wolnelektury_%s.csv' % date.today(),
         signals=[Book.published])
 def catalogue_csv(path):