Columbia subject headings:
Harvard subject headings:
Gay men--Housing--Austria.
Gay men--Housing--Germany.
Gay men--Housing--Switzerland.
Gays--Austria.
Gays--Germany.
Gays--Switzerland.
Princeton subject headings:
Gay travelers--Austria--Guidebooks.
Gay travelers--Germany--Guidebooks.
Gay travelers--Switzerland--Guidebooks.
Gays--Europe--History--Guidebooks.
Gays--Services for--Europe--Guidebooks.
Guidebooks.
Historic sites--Europe--Guidebooks.