The Leiden University has compiled etymological dictionaries of various IE languages , a project supervised by Alexander Lubotsky and which includes a Proto-Celtic dictionary by Ranko Matasović. Unfortunately , those dictionaries published by Brill in the Leiden series have been removed from the University databases for copyright reasons. Alternatively , a reference for Proto-Celtic vocabulary is provided by the یونیورسٹی آف ویلز at the following sites:
Entity: یونیورسٹی آف ویلز — Type: /organization, /location, /organization/educational_institution