This is volume 16 of the Leonine critical edition of the works of St. Thomas Aquinas. It includes the indices to the Summa theologiae and the Summa contra gentiles. It includes:
1. An index of every Scripture passage cited.
2. An index of every reference to one of St. Thomas's own works cited.
3. An index of to every other author cited.
Each of these indices has separate sections covering St. Thomas's citations, Cajetan's and Ferrara's citations, and the Leonine editors' citations.
