Columbia subject headings:
Chicago (Ill.)--Ethnic relations.
Immigrants--United States--History.
Polish American Catholics--History.
Polish Americans--History.
Polish Roman Catholic Union of America--History.
Harvard subject headings:
Chicago (Ill.)--Ethnic relations.
Immigrants--United States--History
Polish American Catholics--History.
Polish Americans--History
Polish Roman Catholic Union of America--History.
Princeton subject headings:
Catholic Church--United States--History--19th century.
Catholic Church--United States--History--20th century.
Immigrants--United States--History--19th century.
Immigrants--United States--History--20th century.
Polish Americans--History--19th century.
Polish Americans--History--20th century.
Polish Roman Catholic Union of America--History.