Columbia subject headings:
Business--Periodicals--Bibliography.
Business--Periodicals--Directories.
Business--Periodicals--Indexes--Bibliography.
Periodicals--Directories.
Periodicals--Special numbers--Bibliography.
Harvard subject headings:
Princeton subject headings:
Business--Periodicals--Bibliography.
Business--Periodicals--Directories.
Business--Periodicals--Indexes--Bibliography.
Directories.
Periodicals--Directories.
Periodicals--Special numbers--Bibliography.