Columbia subject headings:
Consumers--Information services--United States--Handbooks, manuals, etc.
Demographic surveys--Handbooks, manuals, etc.
Marketing research--Handbooks, manuals, etc.
Harvard subject headings:
Consumers--United States--Information services--Handbooks, manuals, etc.
Demographic surveys--Handbooks, manuals, etc.
Marketing research--Handbooks, manuals, etc.
Princeton subject headings:
Consumers--Information services--United States--Handbooks, manuals, etc.
Demographic surveys--Handbooks, manuals, etc.
Marketing research--Handbooks, manuals, etc.