Columbia subject headings:
Business--Periodicals.
Corporations--United States--Directories.
Industries--United States--Periodicals.
Harvard subject headings:
Princeton subject headings:
Business information services--United States--Directories.
Corporations--United States--Finance--Statistics--Periodicals.
Directories.
Manufacturing industries--United States--Statistics--Periodicals.
Periodicals.
Statistics.
United States--Commerce--Statistics--Periodicals.