The XIII centenary of St. Gregory
Subtitle: encyclical letter of Pius X.
Contributors: Pius X, Pope, 1835-1914
Publisher: s.n.
Published: 1900
Place of publication: [S.l
Language: eng
Number of pages: 145
Other titles: Thirteenth centenary of St. Gregory.
Work titles: Iucunda sane
Notes: Cover title; caption title reads: The thirteenth centenary of St. Gregory.

Includes bibliographical references,