https://europeanmemories.net/thematic-area/spanish-civil-war/
https://guides.library.yale.edu/c.php?g=296063&p=1973557
https://archiveshub.jisc.ac.uk/features/spanishcivilwar.shtml
https://cdm21047.contentdm.oclc.org/digital/collection/scw
https://www.marx-memorial-library.org.uk/special-collections-and-subject-guides/spanish-collection
https://library.ucsd.edu/speccoll/scwmemory/about-eng.html
https://www.culturaydeporte.gob.es/cultura/areas/archivos/mc/archivos/cdmh/portada.html
https://alba-valb.org/education/resources/