“AN ARCHITECTURAL APPROACH COMBINING 3D SCANNING AND UNPUBLISHED ARCHIVES TO THE ANALYSIS OF A 19TH-CENTURY ENGINEERING STRUCTURE: CASE STUDY OF THE CHIFFA RAILWAY VIADUCT ALGERIA” (2025) International Journal of Innovative Technologies in Social Science [Preprint], (1(45). doi:10.31435/ijitss.1(45).2025.3143.