@Misc{BVMC:885766, author = {Iglesia Católica}, title = {[Missale. Latín] Missa in festo Sanctae Helenae Imperatricis viduae : die XXX augusti.}, url = {https://www.cervantesvirtual.com/obra/missale-latin--missa-in-festo-sanctae-helenae-imperatricis-viduae-die-xxx-augusti-885766} }