Columbia subject headings:
Harvard subject headings:
Lumber trade--Canada--History.
Lumber trade--North America--History.
Lumber trade--United States--History.
North American Wholesale Lumber Association--History.
North American Wholesale Lumber Association.
Wholesale trade--North America--History.
Princeton subject headings:
Lumber trade--Canada--History.
Lumber trade--North America--History.
Lumber trade--United States--History.
North American Wholesale Lumber Association--History.
Wholesale trade--North America--History.