Columbia subject headings:
Friendship--Sociological aspects.
Friendship.
Heidegger, Martin, 1889-1976.
Political science.
Harvard subject headings:
Friendship--Sociological aspects.
Friendship.
Heidegger, Martin, 1889-1976
Political science
Political science--Philosophy
Princeton subject headings:
Friendship--Sociological aspects.
Friendship.
Heidegger, Martin, 1889-1976.
Political science.