[Syllabus from pages 341-343 intentionally omitted]
Messrs. Walter L. Bowers, of Los Angeles, Cal., and Strother P. Walton, of Fresno, Cal., for appellants.
Mr. G. Levin Aynesworth, of Fresno, Cal., for appellees.
Mr. Robert L. Stern, of Washington, D.C., for the United States as amicus curiae by special leave of Court.
Mr. Chief Justice STONE delivered the opinion of the Court.