Columbia subject headings:
Catholic Church--Austria--Liturgy--Bibliography.
Catholic Church--Germany--Liturgy--Bibliography.
Catholic Church--Liturgy--Bibliography.
Catholic Church--Luxembourg--Liturgy--Bibliography.
Catholic Church--Switzerland--Liturgy--Bibliography.
Liturgics--Bibliography.
Harvard subject headings:
Catholic Church--Europe, German-speaking--Liturgy--Bibliography.
Catholic Church--Europe, German-speaking--Liturgy.
Europe, German-speaking--Church history.
Princeton subject headings: