To find resources on dogmatic theology in the catalog, select the "Subject" search on the Advanced Search page. Some of the terms you would use include "dogma," "theology," and "dogmatic."
Depending on your topic, you can narrow down your searching even further by adding subdivisions. You could also change the results by the format of the book, adding terms like "Encyclopedias," "Handbooks, manuals, etc.," and "Dictionaries" to the end, bringing back just those types of items.
Broadening your search could be beneficial as well, including topics like "Catholic theology," "Catholic doctrine," "sacraments," and "apologetics."
Here are a few examples of certain subjects available in the Library's catalog:
BR- Christianity
BT- Doctrinal Theology
BX1746-1755- Catholic Church - Theology. Doctrine. Dogmatics.
Catechism of the Catholic Church by 
Fundamentals of Catholic Dogma by 
Introduction to the Dogmatic Theology by 
The Theology of the Church by 
International Theological Commission: Texts & Documents, 1969-1985 by 
Theological Investigations by 
Pastoral Letters of the United States Catholic Bishops, 1983-1988 by Summa theologiae : Latin text and English translation, introductions, notes, appendices, and glossaries by 
The Christian Faith by 
Decrees of the Ecumenical Councils by Papal Pronouncements, a Guide, 1740-1978 by 
The Post-Synodal Apostolic Exhortations of John Paul II by 
The Encyclicals of John Paul II by 
Vatican Council II: the conciliar and post conciliar documents by 
Enchiridion Vaticanum : testo ufficiale e traduzione italiana
