Switchmen's Union of North America v. National Mediation Board

Mr. Donald R. Richberg, of Washington, D.C., for petitioners.

Mr. Robert L. Stern, of Washington, D.C., for respondents National Mediation Board et al.

Mr. Bernard M. Savage, of Baltimore, Md., for respondent Brotherhood of Railroad Trainmen.

Mr. Justice DOUGLAS delivered the opinion of the Court.