In NLRB v. O.K. Van Storage, Inc., (5 Cir. 1961) 297 F.2d 74, 76, the necessity for granting a hearing on objections to an election was under consideration.
In N.L.R.B. v. Sidran, 181 F.2d 671 (C.A. 5), cited by respondent, the Court could only have held that the Board erred in denying a hearing if "substantial and material factual issues" were raised.