https://gregobase.selapa.net/history.php?changeset=1560325732%7C8460%7C5937
GregoBase - History - Nuptiae factae sunt
historynuptiaesunt
https://globalchant.org/domains/globalchant.org/text-details.php?text=Nuptiae-factae-sunt-in-Cana
GLOBAL CHANT DATABASE - Nuptiae factae sunt in Cana
Online searchable database of Gregorian Chant and medieval music
globalchantdatabasenuptiaesunt