- Albumen Photographs: History, Science, and Preservation, American Institute for Conservation.
- Chronology of Photographic Processes, Conserve O Gram.
- Cyanomicon: History, Science and Art of Cyanotype: Photographic Printing in Prussian Blue, Mike Ware.
- A Guide to Fiber-Base Gelatin Silver Print Condition and Deterioration, Gawain Weaver.
- Object: Photo, Museum of Modern Art.
- Photographic Processes Series, George Eastman Museum.
- PMG Cased Photographs, AIC Wiki.
- PMG Photographic Processes, AIC Wiki.
- Types of Photographs, Preservation Leaflet.
- Understanding Early Photography, Smithsonian Museum Conservation Institute.