Columbia subject headings:
Harvard subject headings:
Frank, Aaron--Correspondence.
Frank, Selma--Correspondence.
Germans--New York (State)--New York--Intellectual life--19th century.
Germany--History--Revolution, 1848-1849--Sources.
Mainz (Rhineland-Palatinate, Germany)--Relations--New York (State)--New York.
New York (N.Y.)--Relations--Germany--Mainz (Rhineland-Palatinate)
Politicians--Germany--Correspondence.
Revolutionaries--Germany--Correspondence.
Schütz, Friedrich, 1813-1877
Schütz, Friedrich, 1813-1877--Correspondence.
Schütz, Friedrich, 1813-1877--Friends and associates.
Zitz, Franz H.--Correspondence.
Princeton subject headings:
Forty-Eighters (American immigrants)--Biography.
Germany--Politics and government--1866-1871.
Germany--Politics and government--1871-1888.
Politicians--Germany--Biography.
Revolutionaries--Germany--Biography.
Schütz, Friedrich, 1813-1877.
Zitz, Franz, 1803-1877.