These are just a few of the resources we've found useful over the years.
WWI Stereoview Collections
- Golden Age Archives Their inventory includes two Keystone World War sets on CD and a copy of the companion guide (with maps) for the 1923 set
- Library of Congress This link is a search on their Stereograph Cards collection
- George Eastman House Extensive collection
- R.M. Yost Historian and collector
- Keystone-Mast Collection Via the Calisphere search engine
- Ignomini Collector of many things, including the Great War stereoviews on this page
Info on Stereoview Publishers
- NSA National Stereoscopic Association, Publishers of Stereo World
- Keystone Document from the Keystone-Mast Collection
- George Rose Ron Blum's book on the Australian master stereographer
- Stereoviews: an Illustrated History and Price Guide John Waldsmith's classic book filled with general info on publishers
- Private Pictures: Soldiers' Inside View of War Book which describes non-official photography during wartime
- H.D. Girdwood Wiki entry on the man behind Realistic Travels
- Jules Richard Brief bio of the man behind Verascope Richard stereographs