Columbia subject headings:
Harvard subject headings:
Governors--Austria--Vienna--Biography.
Ludwig, Michael, 1961-
Mayors--Austria--Vienna--Biography.
Politicians--Austria--Vienna--Biography.
Vienna (Austria)--Politics and government--21st century.
Princeton subject headings:
Ludwig, Michael, 1961-
Mayors--Austria--Vienna--Biography.
Politicians--Austria--Vienna--Biography.
Vienna (Austria)--Politics and government.