Columbia subject headings:
Harvard subject headings:
Forest products--Research--Germany--History--20th century.
Forests and forestry--Research--Germany--History--20th century.
National socialism and agriculture.
National socialism and science.
Princeton subject headings:
Forest products--Research--Germany--History--20th century.
Forests and forestry--Research--Germany--History--20th century.
National socialism and agriculture.
National socialism and science.