Sacred Congregation for Divine Worship, Leter to the Presidents of the National Conferences of Bishops Concerning Eucharistic Prayers; United States Catholic Conference, Washington D.C., 1973/0427, PGEN 128/5529. General Collection, GEN. University of Notre Dame Archives. https://archivesspace.library.nd.edu/repositories/2/archival_objects/1097195 Accessed November 29, 2024.