Columbia subject headings:
Catholic Church--Doctrines.
Catholic Church--Worship.
Catholic Church. Catechismus Ecclesiae Catholicae.
Christian ethics--Catholic Church.
Spirituality--Catholic Church.
Harvard subject headings:
Catholic Church--Catechisms.
Catholic Church--Doctrines.
Catholic Church. Catechismus Ecclesiae Catholicae
Christian ethics--Catholic Church.
Spiritual life--Catholic Church
Theology, Doctrinal.
Worship
Princeton subject headings: