Title: La réforme du calendrier aux Conciles de Constance et de Bâle
Subjects: Gregorian Calendar, Calendar reform, Council of Constance (1414-1418 : Konstanz, Germany) (uri) http://id.loc.gov/authorities/names/n50040012 (uri) http://viaf.org/viaf/sourceID/LC|n50040012, Council of Basel (1431-1449 : Basel, Switzerland) (uri) http://id.loc.gov/authorities/names/n79129626 (uri) http://viaf.org/viaf/sourceID/LC|n79129626