Columbia subject headings:
Depressions--1929--United States.
Public welfare--United States--History--20th century.
Social service--United States--History--20th century.
Social workers--Political activity--United States.
Harvard subject headings:
Depressions--1929--United States
Public welfare--United States--History--20th century
Social service--United States--History--20th century.
Social workers--Political activity--United States.
Social workers--United States--Political activity.
Princeton subject headings:
Depressions--1929--United States.
Public welfare--United States--History--20th century.
Social service--United States--History--20th century.
Social workers--United States--Political activity.