Charles KENT, Clyde Lindstrom, Douglas Salyer, and Glenn Skelton, and Plumbers Local Union 519, AFL-CIO, an unincorporated labor organization, Appellants, v. Thomas W. WARD and Lester Byron Nelson, d/b/a Ward Paving Company, Robert L. Turchin, Inc., a Florida corporation, and Barney Kaden, individually and as Chief Plumbing Inspector in the City of Hialeah, Florida, Appellees. Plumbing Industry Program, Inc., Amicus Curiae, 125 So. 2d 610