Directives for the Building of a Church by the Liturgical Commission of the German Hierarchy, Composed by the Rev. Theodor Klauser, Rector Magnificus of the University of Bonn, The Liturgical Press, St. John's Abbey, Collegeville, MN, Reprinted from Orate Fratres, Vol. XXIV, No. 1, December 1949, 1949/12, CMTH 16/24, Box: CMTH 16, Folder: 24. Michael A. Mathis Papers, MTH. University of Notre Dame Archives. https://archivesspace.library.nd.edu/repositories/2/archival_objects/388616 Accessed December 30, 2025.