John DeMayo and Joseph Casino, The Forty-First Interional Eucharistic Congress, August 1-8, 1976: A History, (Pennsauken: DeVilieger, 1978) 6, 144; MC 80, 100.611: Committee on Special Guests: Final Report to the Board of Governors, August 16, 1967, https://omeka.chrc-phila.org/items/show/8121.
MC 80, 100.1548: Letter to Cardinal Krol from Dorothy Day January 29, 1976, https://omeka.chrc-phila.org/items/show/8123; MC 80, 100.1673: Letter to Cardinal Krol from Mother Teresa.