Scriptum in IV Libros Sententiarum (1252-1257)
Editio nova.  Paris 1929-1947.  Editors: R.P. Mandonnet and M.F. Moos.  This work is the four-volume commentary of St. Thomas Aquinas on the Sentences of Peter Lombard (Stacks, BQ 6856 .C62 1929a) 

Summa Contra Gentiles (1259-1264)
Text in Latin can be found in the Leonine edition of Opera Omnia, v. XIII - XV.  The set is available in the Religious Studies and Philosophy Library Folios, room 316 (BQ 6822 1882).  Also published in a one-volume "manual" edition: Summa Contra Gentiles, 1934, Editio Leonina Manualis (Rm. 314, BQ6862 .A2 1934) 

Lectura Romana in Primum Sententiarum Petri Lombardi
This work presents once thought-lost work of St. Thomas Aquinas, a second commentary on Book I of Peter Lombard's Liber Sententiarum.  Edited by Leonard E. Boyle and John F. Boyle.  The set is available in the Religious Studies and Philosophy Library Folios, room 316 (B 765.P33 T45 2006).  

Summa Theologiae (1265-1273)
This five-volume set consists of the Latin edition of the Primas Pars, Prima Secundae, Secunda Secundae, and Tertia Pars. A index is included in each volume. The fifth volume contains supplementary material to the Teritae Partis (Stacks, BQ 6835 1941).

Scriptum Super Libros Sententiarum
Aquinas on Creation: writings on the "Sentences" of Peter Lombard, book 2, distinction 1, question 1 (Stacks, BQ 6856 .C637 E5 1997).  Translated by Steven E. Baldner & William E. Carroll. 

Summa Contra Gentiles
The Summa Contra Gentiles of Saint Thomas Aquinas (Stacks, BQ 6862 .A3 E5).  Translated by Anton C. Pegis. 

Summa Theologiae
Summa Theologica (Stacks, BQ 6838 .E5 1947).  First American edition literally translated by Fathers of the English Dominican Province.  Includes synoptical charts; Summa Theologiae: a concise translation edited by Timothy McDermott (BQ 6838 .E5 1989);  Summa Theologiae: Latin text and English translation (Stacks, BQ 6838 .E5 1964). Also known as the "Blackfriars edition".  Includes introductions, notes, appendices, and glossaries.