Biblioteka
Instytutu
Józefa Piłsudskiego w Ameryce 
Biblioteka
imienia
Alfreda Jurzykowskiego Polskiego Instytutu Naukowego w
Ameryce
Biblioteka Marjanczyków Polskiej Fundacji Kulturalnej 
Halecki, Oskar
From Florence to Brest (1439-1596) / Oscar Halecki. - Rome : Sacrum Poloniae Millennium, 1958. - 444 s. ; 29 cm.
Orthodox Eastern Church -- Relations -- Catholic Church Catholic Church -- Relations -- Orthodox Eastern Church Council of Florence -- 1438-1445 Union of Brest -- 1596
From Florence to Brest (1439-1596) / Oscar Halecki. - Rome : Sacrum Poloniae Millennium, 1958. - 444 s. ; 29 cm.
Orthodox Eastern Church -- Relations -- Catholic Church Catholic Church -- Relations -- Orthodox Eastern Church Council of Florence -- 1438-1445 Union of Brest -- 1596