USCCB (United States Conference of Catholic Bishops)
GIRM (General Instruction of the Roman Missal)
The Sunday Website of Saint Louis University
DVCII(Documents of the Second Vatican Council
CSL (Constitution on the Sacred Liturgy) (Sacrosantum Concilium)
DCDR (Dogmatic Constitution on Divine Revelation (Dei Verbum)
DCC (Dogmatic Constitution on the Church) (Lumen Gentium)