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- 2,456 Johonson
- Liber Pro
- iOS Apps: Reference By: Anchoright Productions
- Free
- Lists: 0 + 0 Rankings: 0 Reviews: 0
- Points: 1 + 8 Version: 3.6.2 Liber Pro takes the 1961 Liber Usualis, a book of over 2,300 pages of Gregorian Chant for use throughout the liturgical year, and literally puts it at your fingertips on your iPhone, ...