Columbia subject headings:
Harvard subject headings:
Benjamin, Walter, 1892-1940--Congresses.
Benjamin, Walter, 1892-1940--Exile--Congresses.
Benjamin, Walter, 1892-1940--Travel--Congresses.
Princeton subject headings:
Benjamin, Walter, 1892-1940--Congresses.
Benjamin, Walter, 1892-1940--Exile--Congresses.
Benjamin, Walter, 1892-1940--Travel--Congresses.