Shapiro v. Thompson
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Francis J. MacGregor, Fairfield, Conn., Richard W. Barton, Washington, D.C., and William C. Sennett, Harrisburg, Pa., for appellants.
Archibald Cox, Washington, D.C., for appellees.
Lorna L. Williams, Sp. Asst. Atty. Gen., Des Moines, Iowa, for State or Iowa, as amicus curiae.
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Mr. Justice BRENNAN delivered the opinion of the Court.