[Pius XI, Pope]..
Encyclical letter of His Holiness Pius XI by divine providence Pope to the patriarchs, primates, archbishops, bishops and other ordinaries in peace and communion with the apostolic see on Atheistic communism /

. - Vatican  : Vatican Polyglot Press,  1937 
. - 35 p.  27 cm. 
<br/>К.: Бібліогр. в підрядк. прим.