Columbia subject headings:
Harvard subject headings:
Agriculture and state--Austria--Lower Austria--History--20th century.
Agriculture--Economic aspects--Austria--Lower Austria--History--20th century.
Lower Austria (Austria)--Economic conditions--20th century.
National socialism--Austria--Lower Austria--History.
Niederdonau (Reichsgau)--Rural conditions.
Princeton subject headings:
Agriculture and state--Austria--History--20th century.
National socialism and agriculture.