3 Antoniazzi, A. Antoniazzi, A. Barogi, M. Fontana, F. Peretto, C. Piani, G. Sabattini, S. Ungaro, S. 1998 Pebble industries of the Rimini area XIII International Congress of Prehistoric and Protohistoric Sciences Forlì A.B.A.C.O. s.r.l. 6, Workshop 13, tomo II 991-1000 08/09/1996 pebble industries,rimini,covignano hill