Columbia subject headings:
Harvard subject headings:
Benjamin, Walter, 1892-1940--Criticism and interpretation--Congresses.
Benjamin, Walter, 1892-1940--Knowledge--Engineering--Congresses.
Benjamin, Walter, 1892-1940--Knowledge--Science--Congresses.
Science--Philosophy--Congresses
Technology--Philosophy--Congresses
Princeton subject headings:
Benjamin, Walter, 1892-1940--Criticism and interpretation.
Benjamin, Walter, 1892-1940--Knowledge--Engineering.
Benjamin, Walter, 1892-1940--Knowledge--Science.