association-of-bituminous-contractors-inc-v-cecil-d-andrus-secretary , 581 F.2d 853 ( 1978 )
bituminous-coal-operators-association-inc-and-each-of-its-member , 547 F.2d 240 ( 1977 )
Ray Marshall, Secretary of Labor, United States Department of Labor v. Stoudt's Ferry Preparation Company , 602 F.2d 589 ( 1979 )