Columbia subject headings:
Constitutional law--United States.
Industrial policy--United States.
Petroleum industry and trade--United States.
United States Congress--Powers and duties.
United States Federal oil conservation board.
Harvard subject headings:
Constitutional law--United States
Industrial policy--United States
Petroleum industry and trade--United States
Petroleum law and legislation--United States.
United States. Congress--Powers and duties.
United States. Federal Oil Conservation Board.
Princeton subject headings:
Constitutional law--United States.
Industrial policy--United States.
Petroleum industry and trade--United States.
United States. Congress--Powers and duties.
United States. Federal Oil Conservation Board