Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Matheson, Colin
Colin Matheson, Keeper of Zoology, National Museum of Wales - http://www.fishportboats.co.uk/ForewordbyDrDavidJenkins.htm
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.