Sanctissimi domini nostri Pii, divina providentia Papae XI Litterae encyclicae de usu exercitiorum spiritualium magis magisque promovendo (Die xx Decembris mcmxxix: "Mens nostra")
Publisher: Herder
Published: 1930
Place of publication: Friburgi Brisgoviae
Language: lat
Number of pages: 41
Subjects: Spiritual life.
Notes: Latin and German on opposite pages; added t.-p. in German.