Columbia subject headings:
Urbanization--Australia--History--19th century.
Urbanization--Canada--History--19th century.
Urbanization--History--19th century.
Urbanization--New Zealand--History--19th century.
Urbanization--United States--History--19th century.
Harvard subject headings:
Frontier and pioneer life--19th century.
Frontier and pioneer life--Australia--19th century.
Frontier and pioneer life--Canada--19th century.
Frontier and pioneer life--New Zealand--19th century.
Frontier and pioneer life--United States--19th century.
Urbanization--Australia--History--19th century.
Urbanization--Canada--History--19th century.
Urbanization--History--19th century.
Urbanization--New Zealand--History--19th century.
Urbanization--United States--History--19th century.
Princeton subject headings:
Urbanization--Australia--History--19th century.
Urbanization--Canada--History--19th century.
Urbanization--History--19th century.
Urbanization--New Zealand--History--19th century.
Urbanization--United States--History--19th century.