Columbia subject headings:
Harvard subject headings:
Austria--Ethnic relations--Congresses.
Europe--Ethnic relations--Congresses.
Romanies in literature--Congresses.
Romanies--Austria--Social life and customs--Congresses.
Romanies--Europe--Social life and customs--Congresses.
Travelers--Austria--Social life and customs--Congresses.
Travelers--Europe--Social life and customs--Congresses.
Princeton subject headings:
Austria--Ethnic relations--Congresses.
Europe--Ethnic relations--Congresses.
Romanies in literature--Congresses.
Romanies--Austria--Social life and customs--Congresses.
Romanies--Europe--Social life and customs--Congresses.
Travelers--Austria--Social life and customs--Congresses.
Travelers--Europe--Social life and customs--Congresses.