Columbia subject headings:
Health education--Audio-visual aids--Catalogs.
Health--Bibliography.
Health--Information services--United States--Directories.
Medicine, Popular--Bibliography.
Medicine--Information services--United States--Directories.
Harvard subject headings:
Health education--Audio-visual aids--Catalogs.
Health--Bibliography
Health--Information services--Directories.
Medicine, Popular--Bibliography.
Medicine--United States--Information services--Directories
Princeton subject headings: