Plumbers, Steamfitters, Refrigeration, Petroleum Fitters and Apprentices of Local 298, A.F. of L. v. County of Door

Mr. David Previant, Milwaukee, Wis., for petitioners.

Mr. Donald J. Howe, Sturgeon Bay, Wis., for respondents.

Opinion of the Court by Mr. Justice BLACK, announced by Mr. Justice DOUGLAS.