The Conservation of stone II : preprints of the contributions to the international symposium, Bologna, 27 - 30 October 1981 - Rossi-Manaresi, Raffaella (Centro per la Conservazione delle Sculture all'Aperto, 1981)
Sponsored by the International Centre for Conservation and the International Council of Monuments and Sites.
At head of t.p.: Centro per le conservazione delle sculture all'aperto Bologna