Web resources, authored or co-authored by Paul Messier
- Library of 20th Century Photographic Paper Resources -- an ongoing project to catalog the studio's library of secondary sources on the history and use of photographic paper
- Interviewed by Alejandra Mendoza, Paul Messier discusses photograph conservation theory and practice, March, 2009 (password is Messier)
- Lewis Hine Powerhouse Mechanic: Materials and Research, GEH Notes on Photographs
- VideoPreservation Website Funded by the National Center for the Preservation Training and Technology and hosted by Standard University, August, 2007
- Backprinting on photographic paper - a compendium of manufacturer markings on photographic paper, 2007
- Conservation of Photogravures for the Photogravure Website, 2006
- Notes on Dating Photographic Paper and
Preservation of Photographs: Handling Storage, Display, Conservation and Restoration for the Association of Photographic Art Dealers website, 2005 - Albumen Photography Website, (co-authors T.Vitale, W.Henry & J.Burke), September 2000. Popular Science “Editor’s Pick,” July 2001 & D-Lib Magazine Featured Collection, May 2003
- Video Format Identification Guide, (with S.Stauderman), November 2000