In 1999, a full bibliography on the subject, listing 1580 publications, was made available in Marco Mostert, ‘A Bibliography of Works on Medieval Communication’, in: New Approaches to Medieval Communication, ed. Marco Mostert (Turnhout, 1999: USML 1) pp. 193-318. An expanded and corrected bibliography, listing 6843 publications, has appeared as Marco Mostert, A Bibliography of Works on Medieval Communication (Turnhout, 2012: USML 2). Updates to the bibliography will be provided in due course.