De Progressione Calendarii Iuliano-Gregoriani sub triplice aspectu scientifico practico ac religioso considerata. Ex "Ephemerid. Liturgic." an XXXVII-1923, etc.
Chauve-Bertrand,Abbé.
Baar, Armand.
Romae, 
1923.
Joint authors: Abbé Chauve-Bertrand and Armand Baar.