Columbia subject headings:
Courts--Canada--Directories.
Courts--United States--Directories.
Law--Canada--Digests.
Law--United States--Digests.
Lawyers--Canada--Directories.
Lawyers--United States--Directories.
Patent lawyers--Canada--Directories.
Patent lawyers--United States--Directories.
Harvard subject headings:
Courts--Canada--Directories.
Courts--United States--Directories
Law--Canada--Digests.
Law--United States--Digests.
Lawyers--Canada--Directories
Lawyers--United States--Directories
Patent lawyers--Canada--Directories.
Patent lawyers--United States--Directories.
Princeton subject headings: