Columbia subject headings:
Paper industry--United States--Statistics--Periodicals.
Paperboard industry--United States--Statistics--Periodicals.
Wood-pulp industry--United States--Statistics--Periodicals.
Harvard subject headings:
Paper industry--United States--Statistics--Periodicals.
Paperboard industry--United States--Statistics--Periodicals.
Wood-pulp industry--United States--Statistics--Periodicals.
Princeton subject headings: