Columbia subject headings:
Law libraries--Periodicals--Directories.
Law libraries--United States--Periodicals--Directories.
Library science literature--Marketing--Directories.
Library science literature--Publishing--Directories.
Library science literature--Publishing--United States--Directories.
Library science literature--United States--Marketing--Directories.
Harvard subject headings:
Law libraries--Periodicals--Directories.
Law libraries--United States--Periodicals--Directories.
Library science literature--Marketing--Directories.
Library science literature--Publishing--Directories.
Library science literature--Publishing--United States--Directories.
Library science literature--United States--Marketing--Directories.
Princeton subject headings: