Columbia subject headings:
Holding companies--United States.
Hydroelectric power plants--United States.
Natural gas--Law and legislation--United States.
Public utilities--United States.
United States. Federal Power Commission.
Water--Law and legislation--United States.
Harvard subject headings:
Holding companies--United States.
Hydroelectric power plants--United States
Natural gas--Law and legislation--United States
Public utilities--United States.
United States. Federal Power Commission.
Water--Law and legislation--United States
Princeton subject headings:
Holding companies--United States.
Hydroelectric power plants--United States.
Natural gas--Law and legislation--United States.
Public utilities--United States.
United States. Federal Power Commission
Water--Law and legislation--United States.