The following has been added to the Zotero Group for Ancient World Open Bibliographies and the Ancient World Open Bibliographies Wiki.
A Bibliography for Celtic Studies
A. G. van Hamel Foundation for Celtic Studies
Under development (2011).
This searchable database, under development and first focusing on the works of Dutch scholars in this field, aims to ultimately be comprehensive. It contains books and monographs from a variety of dates (19th century-2010) and in multiple languages.