Cascón-Katchadourian, Jesús, and Jordi Alberich-Pascual. 2021. “The Georeferencing of Old Cartography in Geographic Information Systems (GIS): Review, Analysis and Comparative Study of Georeferencing Software”. Revista General de Información Y Documentación 31 (1): 437-60. https://doi.org/10.5209/rgid.76965.