Kennecott Copper Corporation v. Environmental Protection Agency, the Project on Clean Air of the Natural Resources Defense Council, Inc., Intervenors , 462 F.2d 846 ( 1972 )
Natural Resources Defense Council, Inc. v. Environmental Protection Agency , 465 F.2d 492 ( 1972 )
environmental-defense-fund-incorporated-v-william-d-ruckelshaus , 439 F.2d 584 ( 1971 )