(Certiorari, ante, p. 813, to the United States Court of Appeals for the Seventh Circuit.) The motion of the petitioners to remove this case from the summary calendar is denied. Thé motion of the Solicitor General, on behalf of the United States, for leave to participate in the oral argument, as amicus curiae, is granted and thirty minutes are allotted for that purpose. Counsel for the petitioners and counsel for the respondent are allotted an additional fifteen minutes each for oral argument.