In a civil antitrust action, the Government moved for an order directing a vice-president of the corporate defendant to produce for inspection and copying certain documents under his custody and control that had been the subject of a deposition subpoena duces tecum and ad testificandum. The District Court, Edelstein, Chief Judge, held that: (1) although the Government's document demand was substantial, defendant failed to show that the burden of production involved was " unreasonable and oppressive"