Columbia subject headings:
Cities and towns--Effect of technological innovations on--United States.
Cities and towns--United States--Growth.
Metropolitan areas--United States.
United States--Economic conditions.
Harvard subject headings:
Cities and towns--Effect of technological innovations on--United States.
Cities and towns--United States--Growth
Metropolitan areas--United States
United States--Economic conditions.
Princeton subject headings:
Cities and towns--Effect of technological innovations on--United States.
Cities and towns--United States--Growth.
Metropolitan areas--United States.
United States--Economic conditions.