American Institute for Conservation
Atelier de Imagem (PT)
Atelier de Restauration et de Conservation de Phtographies de la Ville de Paris
Atomo 47 (PT)
Australian Network for Information on Cellulose Acetate
Canadian Conservation Institute
Caring for Your Photographs
Centre de Recherches sur la Conservation de Documents Graphiques
Centre International d'Etudes pour la conservation et la Restauration des Biens Culturels
Chicago Albumen Works
Conservation On Line
Fargo Enterprises
Il Laboratorio (IT)
Image Permanence Institute
Institut de Formation des Restauranteurs d'Oeuvres d'Art
International Council of Museums - Conservation Committee
LUPA Luis Pavao (PT)
Neves - Laboratorio de fotografia (PT)
Paul Messier
Photoconservation.com
Phtogravure
Preserving your photographs Windows to the Past
The Association of International Photography Art Dealers
The Centre for Photographic Conservation