TY  - BOOK
T1  - Calendarium Gregorianum perpetuum.
A1  - Gregory‏ XIII,‏ Pope, 1502-1585‏
LA  - Latin
PP  - Antverpiae
PB  - Ex officina Christophori Plantini
YR  - 1583
UL  - https://web.marshlibrary.ie/catalogue/Record/13965
CN  - M1.5.36(2)
KW  - Calendar, Gregorian
KW  - Religious calendars
ER  -