Columbia subject headings:
History--Philosophy--History--20th century.
Philosophical anthropology--History--20th century.
Plessner, Helmuth, 1892-1985.
Schmitt, Carl, 1888-1985.
Harvard subject headings:
History--Philosophy--History--20th century
Philosophical anthropology--History--20th century.
Plessner, Helmuth, 1892-1985
Schmitt, Carl, 1888-1985.
Princeton subject headings:
History--Philosophy--History--20th century.
Philosophical anthropology--History--20th century.
Plessner, Helmuth, 1892-1985.
Schmitt, Carl, 1888-1985.