General

Constitution on the Sacred Liturgy (Sacrosanctum Concilum)

http://www.vatican.va/archive/hist_councils/ii_vatican_council/
documents/vat-ii_const_19631204_sacrosanctum-concilium_en.html

The first document adopted by the council fathers of Vatican II. It has set the direction for the ongoing renewal of Catholic liturgy.

Lectionary Readings and Psalms for Sundays and Weekdays

http://www.usccb.org/nab/index.shtml

The Sunday and daily lectionary of readings and psalms for Mass from the US Bishop’s website.

Liturgy of the Word/Liturgy of the Eucharist

General Instruction on the Roman Missal (2003)

http://www.usccb.org/liturgy/current/GIRM.pdf

The authoritative guide for how the Mass is to be celebrated. Includes adaptations requested by the American bishops and approved by the Holy See.

General Instruction Commentary

http://www.mtsm.org/preaching/resources.htm#GIRM

Applying the principles of the 2002 General Instruction on the Roman Missal to how we celebrate Eucharist in our parishes.

Redemptionis Sacramentum

http://www.vatican.va/roman_curia/congregations/ccdds/documents/rc_con_
ccdds_doc_20040423_redemptionis-sacramentum_en.html

Instruction from the Congregation for Divine Worship on matters to be observed or avoided in the Eucharistic liturgy.

Lectionary Readings and Psalms for Sundays and Weekdays

http://www.usccb.org/nab/index.shtml

The Sunday and daily lectionary of readings and psalms for Mass from the US Bishop’s website.

Center for Liturgy Sunday Web Site

http://liturgy.slu.edu

The Sunday web site offer four entrances to the spirituality of Sunday’s Mass: prayer to aid contemplation of the Sunday readings: spirituality drawn from the readings for the coming Sunday together with the Season of the Church commentary on the readings and music suggestions for Sunday’s Mass.