"The Language of Stained Glass", Timber Press, Forest Grove, Oregon, ISBN 0-917304-61-6==External links==*Preservation of Stained Glass*Church Stained Glass Window Database recorded by Robert E berhard, covering ~2800 churches in the southeast of England*Institute for Stained Glass in Canada, over 2200 photos; a multi-year photographic survey of Canada's stained glass heritage*The Stained Glass Museum (Ely, England)*Stained glass guide (UK)*Gloine - Stained glass in the Church of Ireland Research carried out by Dr David Lawrence on behalf of the Representative Church Body of the Church of Ireland, partially funded by the Heritage Council
Stained Glass: An Architectural Art, Universe Books, Inc., New York, OCLC 21650951* Robert Sowers (1981).