1. Ecole Nationale d'Ingénieur de Saint-Etienne - E.N.I.S.E.; 58 rue Jean Parot 42023 Saint-Etienne Cedex 02 France
2. Paul Messier LLC; Conservation of Photographs & Works on Paper; 103 Brooks Street Boston 02135 Massachusetts
3. Surface Metrology Laboratory; Worcester Polytechnic Institute; 100 Institute Road Worcester 01609 Massachusetts