Columbia subject headings:
Gasoline industry--Corrupt practices--South Dakota--Rapid City.
Gasoline--Prices--South Dakota--Rapid City.
Price maintenance--South Dakota--Rapid City.
Harvard subject headings:
Princeton subject headings:
Gasoline industry--South Dakota--Rapid City--Corrupt practices.
Gasoline--Prices--South Dakota--Rapid City.
Price fixing--South Dakota--Rapid City.