En Autoridades del CSIC: https://csic-primo.hosted.exlibrisgroup.com/primo-explore/fulldisplay?docid=34CSIC_ALMA_AU9817825438404201&context=L&vid=34CSIC_AU&lang=es_ES&search_scope=34CSIC_ALMA_AU&adaptor=Local%20Search%20Engine&tab=default_tab&query=any,contains,Ofertorios&offset=0

En Library Of Congress Authority File: https://id.loc.gov/authorities/subjects/sh85094163.html [Offertories (Music)]