Columbia subject headings:
Freemasonry--Europe, Central--History--20th century.
Freemasonry--Europe, Eastern--History--20th century.
Harvard subject headings:
Freemasonry--Europe, Central--History--20th century.
Freemasonry--Europe, Eastern--History--20th century.
Princeton subject headings:
Freemasonry--Europe, Central--History.
Freemasonry--Europe, Eastern--History.