@book{ title = "Tropen zum Ordinarium Missae", author = "Blume, Clemens", year = "1905", publisher = "Reisland", address = "Leipzig", language = "lat","ger", howpublished = "print", keywords = "Ordinarium,Messe,Sequenz", series = "Tropi graduales = Tropen des Missale im Mittelalter / hrsg. von Clemens Blume ..., 1", series = "Analecta hymnica medii aevi, 47", }