"Fondazione Federico Zeri - Università di Bologna, ente catalogatore della fotografia \"Hobbs, Sherley , Self-Portrait? Head of Elderly Man with Ruff. Copy after Federico Barocci?. Italian, 16th century\""@it . "Federico Zeri Foundation, cataloguing institution of the photograph \"Hobbs, Sherley , Self-Portrait? Head of Elderly Man with Ruff. Copy after Federico Barocci?. Italian, 16th century\""@en . . . . .