Salesian Digital Library in different languages:
Italiano: http://sdl.sdb.org/greenstone3/library?l=it
English: http://sdl.sdb.org/greenstone3/library?l=en
Español: http://sdl.sdb.org/greenstone3/library?l=es
Français: http://sdl.sdb.org/greenstone3/library?l=fr
Português: http://sdl.sdb.org/greenstone3/library?l=pt
Polski: http://sdl.sdb.org/greenstone3/library?l=pl
Archivio Salesiano Centrale: https://archiviosalesiano.net/
Don Bosco Santo: http://www.donboscosanto.eu/
Biblioteca Don Bosco, UPS Roma: https://webopacups.urbe.it/libero/WebOpac.cls