Columbia subject headings:
Historians--United States--Biography.
Morris, Richard B. (Richard Brandon), 1904-1989.
Harvard subject headings:
Historians--United States--Biography
Morris, Richard B. (Richard Brandon), 1904-1989
United States--Historiography.
Princeton subject headings:
Historians--United States--Biography.
Morris, Richard B. (Richard Brandon), 1904-1989.