Columbia subject headings:
Harvard subject headings:
Act (Philosophy)--Congresses.
Heidegger, Martin, 1889-1976--Congresses.
Technology--Philosophy--Congresses
Princeton subject headings:
Act (Philosophy)
Ends and means.
Hegel, Georg Wilhelm Friedrich, 1770-1831.
Heidegger, Martin, 1889-1976.
Nietzsche, Friedrich Wilhelm, 1844-1900.
Technology--Philosophy.