The resources pictured below are available on-line. To access these click on the picture.
The Introduction to the Lectionary of the Mass
Instruction on Music in the Liturgy
(Second Vatican Ecumenical Council)
The Liturgical Ministry Series (pictured below), co-authored by Paul Turner are a valuable resource. They are available from the Liturgical Training Publications and Pleroma Christian Supplies websites.
Further liturgical resources are available on-line from the Auckland Diocese Liturgy Centre and New Zealand Catholic Bishops Conference National Liturgy Office websites.