Columbia subject headings:
Harvard subject headings:
Economics--Germany--History--20th century--Congresses.
Economists--Germany--Biography
Lowe, Adolph, 1893-1995
Lowe, Adolph, 1893-1995--Congresses.
Oppenheimer, Franz, 1864-1943--Congresses.
Oppenheimer, Franz, 1864-1943.
Sociology--Germany--History--20th century--Congresses.
Princeton subject headings:
Capitalism.
Economics.
Lowe, Adolph, 1893-
Oppenheimer, Franz, 1864-1943.
Socialism.