1. Decorative Arts and Sculpture Conservation Department; J. Paul Getty Museum; 1200 Getty Center Drive, Suite 1000 Los Angeles CA 90049-1687 USA
2. Centre de Recherche et de Restauration des Musées de France; Palais du Louvre; 14 quai François Mitterrand F-75001 Paris France
3. MBH Analytical Limited; Holland House; Queens Road Barnet EN5 4DJ UK
4. National Gallery of Art; 6th and Constitution Avenue NW Washington DC 20565 USA
5. The British Museum; Great Russell Street London WC1B 3DG UK
6. Center for Applied Isotope Studies; The University of Georgia; 120 Riverbend Road Athens GA 30602 USA
7. Buffalo State College; 1300 Elmwood Avenue, RH 230 Buffalo NY 14222 USA
8. Het Rijksmuseum; Museumstraat 1 1071 XX Amsterdam The Netherlands