Leisure → Research → United States → Handbooks, manuals, etc.

Recreation → Research → United States → Handbooks, manuals, etc.

Consumer behavior → United States → Handbooks, manuals, etc.

Consumer behavior → United States → Statistics → Periodicals.

Consumers' preferences → United States → Handbooks, manuals, etc.

Marketing research → United States → Periodicals.

Consumer behavior.

Consumers' preferences.

Leisure → Research.

Marketing research.

Recreation → Research.

United States.