1. American Iron and Steel Intitute v EPA , 526 F 2d 1027 Third Circuit, 1975 .
2. Amoco Oil v EPA , 501 F 2d 722, D.C. Circuit, 1974 .
3. Bennett Hills Grazing Association v U.S. , 13 ERC 1527 Ninth Circuit, 1979 .
4. Buckeye Power v EPA , 481 F 2d 162, Sixth Circuit, 1973 .