These cases bring for decision important questions concerning the Administrator's right to judicial enforcement of subpoenas duces tecum issued by him in the course of investigations conducted pursuant to § 11 (a) of the Fair Labor Standards Act. 52 Stat. 1060. His claim is founded directly upon § 9, which incorporates the enforcement provisions of §§ 9 and 10 of the Federal Trade Commission Act, 38 Stat. 717.[1] The subpoenas sought the production of specified records to determine whether petitioners were violating the Fair Labor Standards Act, including records relating to coverage. Petitioners, newspaper publishing corporations, maintain that the Act is not applicable to them, for constitutional and other reasons, and insist that the question of coverage must be adjudicated before the subpoenas may be enforced.