I'm trying to find additional books that are indexes to original sources on concepts/topics i.e. books similar to the following:
- Bercot, David W., ed. A Dictionary of Early Christian Beliefs: A Reference Guide to More than 700 Topics Discussed by the Early Church Fathers. Peabody, MA: Hendrickson Publishers, 1998.
- Jones, Andrew, Robert Klesko, Louis St. Hilaire, and Jason Stellman, eds. Catholic Topical Index. Bellingham, WA: Verbum, 2013.
- Jurgens, W. A., trans. The Faith of the Early Fathers. Vol. 1–3. Collegeville, MN: The Liturgical Press, 1970–1979.
- Roza, Devin. Fulfilled in Christ: The Sacraments—A Guide to Symbols and Types in the Bible and Tradition. Bellingham, WA: Verbum, 2014.
- Willis, John R., ed. The Teachings of the Church Fathers. San Francisco: Ignatius Press, 2002.
Unfortunately, there is no metadata I can find that selects these. Bercot I found only because of the participation of an Anabaptist on the forums. Can the forum members extend my list? Thanks.