Columbia subject headings:
Harvard subject headings:
Balkan Peninsula--Description and travel.
Balkan Peninsula--Ethnic relations.
Balkan Peninsula--Foreign public opinion, Austrian.
Balkan Peninsula--Foreign public opinion, German.
Public opinion--Austria
Public opinion--Germany
Princeton subject headings:
Balkan Peninsula--Description and travel.
Balkan Peninsula--Ethnic relations.
Balkan Peninsula--Foreign public opinion, Austrian.
Balkan Peninsula--Foreign public opinion, German.
Public opinion--Austria.
Public opinion--Germany.