Joana Maria Pujadas-Mora, Alicia Fornes, Josep Llados, Gabriel Brea-Martinez and Miquel Valls-Figols. 2019. The Baix Llobregat (BALL) Demographic Database, between Historical Demography and Computer Vision (nineteenth–twentieth centuries. _Nominative Data in Demographic Research in the East and the West: monograph_.29–61.