The following titles are only a selection of some of the most useful theological dictionaries and encyclopedias. Other print resources may be found by browsing the reference shelves containing the print titles listed below. Many have signed articles by experts on the subject and excellent bibliographies.
The New Dictionary of Catholic Social Thought by 
The New Dictionary of Theology by Dictionnaire de théologie catholique by Sacramentum Mundi: an encyclopedia of theology by Lexikon für Theologie und Kirche by 