Columbia subject headings:
Credit--United States.
Financial crises--United States.
Mortgage loans--United States.
United States--Economic conditions--2001-2009.
Harvard subject headings:
Credit--United States.
Financial crises--United States
Mortgage loans--United States.
United States--Economic conditions--2001-2009.
Princeton subject headings:
Credit--United States.
Financial crises--United States.
Mortgage loans--United States.