In compiling this website the following sources have been consulted and provide further information about the companies named::
Bagley Glass - Angela Bowey, Derek and Betty Parsons, OAR Publishing, 2004 ISBN 0-473-09836-9
Chance Expressions - David P Encill, Cortex Design, 2008, ISBN 978-0-9549196-1-0
Davidson Glass, a history - Chris & Val Stewart, 2005, ISBN 0-9550363-0-5
Sowerby's Ellison Glass Works Vols. 1 & 2, Glen and Stephen Thistlewood, 2005 (on CD)
Marcus Newhall - Sklo Union Art Before Industry Sklo Union website
Pamela Wessendorf's Pressed Glass Pavilion website: http://pressglas-pavillon.de/
Pamela Wessendorf's Glas Musterbuch website - http://www.glas-musterbuch.de
Siegmar Geiselberger's Pressglas-Korrespondenz website - http://www.pressglas-korrespondenz.de/
Note: new sources will be added as used, so please check back for updates
