O'Carroll, Michael. Corpus Christi : An Encyclopedia of the Eucharist. Wilmington, Del.:
Michael Glazier, 1988. BV 825.2 .O726 1988 Reference Fl. 1
Rahner, Karl, ed. Sacramentum Mundi: An Encyclopedia of Theology. 6 vols.
New York: Herder and Herder, 1968. BR 95 .S25 Reference Fl. 1
See especially: vol. 2, "Eucharist"
Ginther, James R. The Westminster Handbook to Medieval Theology. Louisville, KY:
Westminster John Knox Press, 2009. BT 26 .G56 2009 Reference Fl. 1
Hillerbrand, Hans Joachim. The Oxford Encyclopedia of the Reformation. 3 vols. New York: Oxford University Press, 1996.
BR 302.8 .O93 1996 Reference Fl. 1
See especially: Lord's Supper; entries for individual Reformers; names of Conferences and Colloquys (Marburg, for example)