Expert system for the evaluation of the deterioration of ancient brick structures : scientific background of the damage atlas and the masonry damage diagnostic system : Project no. EV5V-CT92-0108 / K. Van Balen...[et al.] ; European Commission, Directorate-General, Science Research and Development. (Research report ; no. 8, v. 1) (Energy, environment and sustainable development) (Community research) (Studies)