Columbia subject headings:
Parsons, Talcott, 1902-1979.
Social systems.
Sociology--United States--History.
Harvard subject headings:
Parsons, Talcott, 1902-1979
Social systems.
Sociology--United States--History
Princeton subject headings:
Parsons, Talcott, 1902-1979.
Social systems.
Sociology--United States--History.