Ravello (Italy), European University Centre for Cultural Heritage, Centre Universitaire Européen pour les biens culturels, 1987, in-8°, 428 pp, sewn, orig. stiff wrapper. This is issue 17 of PACT, Journal of the European Study Group on Physical, Chemical, Biological and Mathematical Techniques applied to archaeology. It deals with the technical aspects of old paintings on walls, marble, cave art etc. Contributions are in French and English and were written by specialists in the field.