Columbia subject headings:
Clearing of land--United States--History.
Forest products industry--United States--History.
Forests and forestry--United States--History.
United States--Historical geography.
Harvard subject headings:
Clearing of land--United States--History.
Forest products industry--United States--History.
Forests and forestry--United States--History
United States--Historical geography.
Princeton subject headings:
Clearing of land--United States--History.
Forest products industry--United States--History.
Forests and forestry--United States--History.
United States--Historical geography.