...under investigation. And in case of disobedience to a subpoena the Commission may invoke the aid of any court of the United States in requiring the attendance and testimony of witnesses and the production of documentory evidence'. 191 A district Court imposed that requirement...

...and documents relating to any matter under investigation, and to that end may invoke the aid of any court of the United States in requiring the attendance and testimony of witnesses and the production of books, papers, and documents under the provisions of this section....

...the Administration, or any party to a proceeding before the Administration, may invoke the aid of any court of the United States in requiring the attendance and testimony of witnesses and the production of books, papers, and documents. (e) An order issued by the Administration...

...Commission, for example, it endowed the Commission with subpoena power: that end may invoke the aid of any court of the United States in requiring the attendance and testimony of witnesses and the production of books, papers, and documents under the provisions of this section,"...