Columbia subject headings:
Harvard subject headings:
Austria--Politics and government--Congresses.
Austro-Marxist school--Congresses.
Bauer, Otto, 1881-1938--Congresses.
Socialism--Austria--History--Congresses.
Socialism--Congresses
Princeton subject headings:
Austria--Politics and government--Congresses.
Austro-Marxist school--Congresses.
Bauer, Otto, 1881-1938--Congresses.
Socialism--Austria--Congresses.
Socialism--Congresses.