Columbia subject headings:
Forest products.
Lumber trade--Directories.
Papermaking--Directories.
Wood-pulp--Directories.
Harvard subject headings:
Forest products
Lumber trade--Directories.
Papermaking--Directories.
Wood-pulp--Directories.
Princeton subject headings:
Forest products.
Lumber trade--Directories.
Papermaking--Directories.
Wood-pulp--Directories.