Localización:PTOLEMY: Towards a linguistic atlas of the earliest Celtic place-names of Europe : Papers from workshop, sponsored by the British Academy, in the Department of Welsh, University of Wales, Aberystwyth, 11-12 April 11999 / David N. Parsons (ed. lit.), Patrick Sims-Williams (ed. lit.), 2000, ISBN 0952747839, págs. 29-53