Resources to help you understand the changes in the Roman Missal:
Diocese of Manchester: www.catholicnh.org/parish-life/liturgy
Changes in Peoples Parts in the Order of the Mass: www.USCCB.org/romanmissal
General Instruction of the Roman Missal: www.usccb.org/liturgy/current/GIRM.pdf
Chant settings for the Roman Missal (ICEL) http://icelweb.org/musicfolder/openmusic.php
