Thomas,  Aquinas, Saint, <br/><br/>
The Blessed Sacrament and the Mass; translated with notes by F. O'Neill. 

 - Westminster, Md.  Newman Press  1955. 
 - 178 p. 
<br/><br/> Selections from the Summa theologica, first published in 1935 under title: St. Thomas Aquinas on the Blessed Sacrament and the Mass.